how does a chubby person who sells nudes market themselves?

so, I sold some nudes today. Found out I really enjoy it and I want to do it more. Thing is, the guy was a chance encounter. String of fate and all that. not only that, but big women like me are probably only a niche interest. How the hell do people do it? does anyone have experience with this? does anyone know someone with experience in this? I live in a small town so its not like there's a local strip club I can go to to ask the strippers for advice. can't just walk in there with a cool 20 and be like "hey so where'd you start?"