As Predator once told me, Read for as long as you can and as much as you can. Then when you think you've read enough, read some more. Airsoft is a touchy sport to get into; it can mess up your life should you play irresponsibly or mess up your bank account should you jump at it too soon :wink:
The FAQ that helped me the most would have to be Meat's Newbie Guide
But make sure to read alot more then just that faq.