Best pointer right here:
Airsoft, no matter how many kills you get or don't get, no matter how many times you get shot.. have fun! Talk to people, make friends, and enjoy spending time outdoors with people who love the same hobby you do.
Some of the best advice I got (thanks Coma!):
"It's not about how many kills you get, it's about how many BB's you go through!"
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."