How do you start a roller derby league?

You have to find a bunch of women (18 and up) who are willing to play, you have to get sponsors, you have to get refs, you have to find arenas to practice in and you have to be able to supply good equipment for your girls to buy. in order to train your girls, you could do it yourself, or hire a trainer to help you. then there is the whole desicion of what kind of league do you want? flat-track or banked-track? this really is a deep question. I suggest you get in touch with some one who knows more about it and not just search it up on wikianswers.