You won't get paid for your first few months working with the reg force.
You'll probably spend 12 months living in a room with 8 or 9 guys that's designed for 4doing work up training.
You'll go overseas for 6 months and do the same job as the regular force.
You'll get home and apply to the reg force, apply for college/university or go on unemployment and look for the next class B tasking with the reserves.