I thought I'd chime in here because this is a fair question and I think it has been answered more optimistically than is realistic. As an infantry platoon commander in the reserves, you will receive an initial amount of training that will allow you to meet a minimum standard equal to the reg force, but only as much as is relevant to take back to your units - in other words, you will not do the mechanized portion and additional training covered therein. So as soon as you are qualified, you are already not meeting the standards required by the reg force. Your phase training will be awesome, get you learning tons of new exciting stuff, and ramp your adrenaline up to a series of unfortunately high expectations. Phase IV (the mechanized platoon commander course) did open up last year for reservists, I was lucky enough to get on myself and it is nice to say that I got the benefit of additional training and perspective, however, it is unlikely that unless I transfer to reg force, I will get much benefit out of the qualification. It is also rumored that the infantry school does not intend to open up the opportunity again - but that's RUMINT and stranger things have happened.
In terms of additional training and opportunities, your training following your qualification will consist mainly of repeating training that occurred while on course (Phase III/DP 1.1/Dismounted Infantry Platoon Commander), however, there will be sporadic attendance from your soldiers (though probably consistent attendance and effort from your best ones) leaving you with a diminished platoon for most of your weekly training and exercises. Your equipment will be limited, in that you will not have the same comms equipment, transportation, weapons, stano, etc. that you will be trained to use on course and will be used to conducting vanilla scenarios in that vacuum of equipment and personnel who are up to date on their skills.Of course, more intense training opportunities will come up during brigade or area collective training, and you may be lucky enough to command a platoon or company on an international exercise in the US or possibly even Europe.
Your time as a platoon commander is where you will have the most fun. It is where you get to participate in the most hands-on training, and get the most amount of face time with your soldiers (probably the best part of the job) before you become a desk jockey. Depending on your unit, the number of platoons, the number of available junior platoon commanders and incoming junior officers will affect how long you hold the position. Some guys will get only one year. Some guys will get five. It depends all on your unit, how well you apply yourself, and how well your peers are able to commit to finishing their own training. Regardless of what your position is, you wil be required to do a lot of paperwork. Doing paperwork does not take you away from training, because you will make time for both. Since training requires soldiers to be present, and paperwork does not, you should expect to put in personal time to finish your paperwork. I frequently finish my staff work at home so that I can dedicate time to my soldiers on the parade square or in the field. If you don't take that extra dedication, the administrative BS will pile up, and your soldiers will eventually suffer for it (or you will when the adj asks where it is).
You will be lucky enough to have plenty of expertise given to you by experienced NCOs who have had the opportunity to work on tour, take part in years of exercises and training, and some who have even been in the regs themselves. None of this is a criticism of the individuals involved or their efforts in doing their jobs as reservists. In my experience they are professionals with a wide variety of experience and strong enthusiasm for their training. These individuals, if you treat them with respect and listen to them, will be sensitive to the nature of your training, understanding that you are purposed with a different position as an officer, than they as soldiers with more hands-on task. A lot of hands-on stuff that you need to learn can come from privates and corporals who can demonstrate any number of skills that you may not necessarily have learned. Asking questions, taking respectful and constructive criticism, and showing a willingness to learn from your subordinates will show that you respect their position as experienced soldiers. Offering them opportunities to voice their opinions on training and tactics will troubleshoot your plans, and make your soldiers feel empowered in their roles (of course, the final decision is yours). If you apply yourself with humor and patience, your soldiers will do the same and show a strong willingness to support your leadership decisions.
Additional courses and training will be harder to come by as you are an officer. Typically, fun skills courses are handed out to NCOs as the troops will in turn get a better training benefit out of it. A Sgt with the Urban Ops Instructor, Recce, CQC, Crowd Control, NBC Instructor, blah blah blah qualification is more useful for teaching hands on skills than an officer. Stuff like jump courses, if they even come to your unit (the moon has turned to blue) are better suited to reward private/corporals/master corporals for strong effort, attendance, attitude etc. or will be driver/comms type stuff that will get them employment later on. The courses you are more likely to receive will consist of staffing courses designed to get you trained for your next level of command, which will feature ever increasing amounts of paperwork. This is not to say that you cannot fight for these opportunities, or that you do not deserve them, but I would carefully weight the benefits of what your team will benefit versus what you will benefit as a result of the training you will receive.
You will get opportunities to run courses yourself as a course officer, mostly recruit and leadership courses. These are excellent opportunities to hone your skills and staff work, be in front of troops, and generally get some field time. Your training will be limited by the level of performance expected of your soldiers, so again, your scenarios will be relatively vanilla as required by the course training plan. As you increase in rank, you will be expected to hand over some of these duties to newer officers for any number of reasons, not the least of which is that they are less likely to be established in their civilian lives and teaching courses is a relatively lucrative and reliable part-time job, but also to allow them the training benefits listed above.
Tour is a whole other matter. Especially since things are solidly winding down there are less and less opportunities for officers. Yes, Psyops and Cimic are something you might get on, but you will probably have to get your unit to put you on the courses rather than getting you to apply directly for the positions. You stand a better chance of getting picked up directly off the course than applying for a Psyops/Cimic position on the tasking brick. These being "field" positions, they are also likely to be grabbed up by the reg force as with more combat oriented positions quickly vanishing, they will be more desirable as opposed to also-ran positions typically granted to reservists. Duty, Ops, and other staff oriented positions are more likely to come up as possibilities than psyops and cimic, or anything else for that matter. That being said, staff positions will be what you make of them. You stand a better chance of being drawn from that pool to a cooler position than not at all. Even if you aren't moved to another positions, a staff position on tour is still filling a necessary role that allows the whole part to move, and you will see greater, more immediate results out of your paperwork on tour, than you likely will sitting in your office back home.
Your eligibility will also be a concern depending on the area you are located in. Ontario guys have a much larger pool to compete with, so you are looking to be a Captain with your AJOSQ and ATOC already in the bag in order to qualify for any position, let alone one that is more desirable. Other areas your chances are greater to get on as an Lt. Your standing on the merit list will also be affected by your participation in courses, brigade events and exercises, and your track record as an officer.
If getting cool hands-on training, and opportunities to fall in as a reg force soldier in the battle group on tour are what you are looking for, you will probably find it more likely to get them as a non-comissioned member. There are plenty of capable men and women in the ranks with degrees and plenty of leadership that could easily be officers, and choose to suffer fools because they don't wish to take on the burden themselves (and to no discredit to them at all).
This probably sounds bleak and isn't what you expected of a reserve infantry officer. They are unfortunately a poorly used resource. On course you will see that they are capable of performing just as well as reg force guys, and in some cases better (in some cases much worse). There are of course exceptions to every rule and there are reserve officers who have had some great opportunities. Participation as an officer will still fulfill a necessary patriotic duty, and support the army. You will receive excellent leadership training that will only prove useful throughout your entire life. You will be challenged in ways that you hadn't ever thought you would. If you have the capabilities to be that excellent leader, the soldiers in the reserves and regular force deserve to have step up to enable their ability to conduct their own jobs and achieve excellence.
