Tme secret is to be able to alternate between moving very fast and making yourself very small. Don't charge in, let the more experienced folks show you where the pints of contention are gonna be, and where to run.
Also: Hydrate. If you're not stopping to pee every two hours, you're not drinking enough.
Oh, and have fun. The only goal of the game is to come out with a big ol' grin on yer muzzle, so play accordingly.