Reserves
You should do it, toughs you up mentally and physically.
They will make you do those aptitude test to see what trades you are qualified to perform. Which mean, you don't necessary have to pick infantry, but Infantry is the coolest!
Be sure to be in high physical condition before you go on your basic or trade training. Be mentally prepared to get yelled at during the first 2 weeks, but don't take it personally. Do not expect to leave once you are at camp, they own your ass!
I don't think people go to reserves to make money. When you are at camp, there is nowhere to spend the money you earn, so you will get a couple of grand at the end of your course.
I am pretty sure you have to volunteer to go to war, as a reservist, nothing to worry about.
Also, you get use weapons you would never get to touch in civilian life. When you are there, you will experience the "spirit d'corp", that you probably will never experience anywhere else. Plus side, it's co-ed, some chance of hooking up if it is a non male-oriented course(service battalion). No pooning while on base, you may get lucky and score a day or weekend eventually to go off base to town.
Have fun!