The single best resource for those interested in club racing is Go Ahead - Take the Wheel. Originally a book written by Dave Gran (who is a New England Region member and driver), it is now a website full of great articles and information about all forms of automobile competitions and track days.
The next best thing to do is talk to current racers. We are always happy to try to help someone, and if we don't know the answers, we probably know someone who does. Come to a meeting, and ask questions!