Nudist Beginnings is a blog full of resources for people considering nudism.
This blog will help you understand what being a nudist is all about. A good first step is the definition currently on Wikipedia:
The meanings of naturism and nudism are very similar, and refer to a cultural and political movement practicing, advocating and defending social nudity in private and public spaces. Several other terms ("social nudity", and recently: "clothes-free") have been proposed as a replacement of these terms, but none has yet found the same wide-spread acceptance as the older terms naturism and nudism.