New to ecf please dont get mad if i do something wrong:
Don't worry , most of us are very docile and non aggressive in nature , anybody who would fly off the handle over someone asking a question has serious issues .
So you want to know where to start huh , yeah , thats what i wanted to know when i joined the forum as well , it's a very good question actually.
It would help a great deal if you told us what situation you are currently in , do you smoke a lot now and are committed to stopping or you are curious about electronic cigarettes in general?
Anyway the links provided by others should help answer some of your concerns/curiosity's.