One of the best ways to get started is come to a launch! You will find that ROC members as a whole are eager and willing to answer questions and share how they got started, what they built first, what to watch out for, how to build a motor, etc.
Also, talk to our vendors. They always have some great beginners kits in stock, along with building supplies you might need – right out on the lakebed!
A web site full of information on all aspects of the hobby is the Rocketry Online Info-Central.