1. Should you go ahead with it? I'll let you decide, after I give my lecture.
2. Yes, I go paintballing all the time. Do you happen to know if you're playing with pads or just regular? Regular, without protection (minus the helmet which is standard), hurts twentyfold the amount it hurts with padding.So, no matter how warm it is outside, be sure to wear thick pants, and atleast one long sleeved tee. So, if you get the choice to play with padding or without, use the padding. A basic rule in paintball is, the farther away from the shooter you are, the less it hurts. However, this completely depends on the paintballs themselves, as well as the guns.
3. If it is your first time playing, then you have the right to be scared. Most people when they're stuck into the arena and are getting shot at for the first time, they panic. It's natural. However, this sport is mounds of fun