Classes. How, Why, and What you can gain/lose.
I've seen a lot of varied responses on classes and I would just like some verification before I do anything with my character. I'm still on Infantry and I do not want to be "stuck" nor make a move I'll regret by choosing a class I may want to play for a limited amount of time. I'm sure I'm not the only one who has had these questions, so hopefully this post can help others in my position.
~ To start, I'll state how I think it works so anything past that will be easily nullified once responses clarify how it really is.