Uhmm hi there....I NEED HELP!!!! 10 points!!!?

Ok, sooo I'm a girl and I like hanging with guys and everything, and my friends (and my crush) invited me to go reballing tomorrow (basically like paintballing without the paint). The thing is, I've never really done this stuff. I've really wanted to, and I finally get to, I don't wanna completley suck, or seem like a girly girl and not hit anybody. Soo TIPS PLEAASE!! Tips on how everything works, how to aim (as if it wasn't obvious), or what the whole experience is like? PLEASE AND THANK YOUS!