or a photographer that shoots models in general, not necessarily for fashion stuff, I like working with and taking pictures of other people in general
I collaborate with a guy that is/has a photography agency, doing mainly motorsports but also school yearbooks and real estate, I have experience using cameras, I've shot a lot of things for my own enjoyment and some for work, I know how to setup lights and I'm overall confident I'd be able to produce good pictures

how would I go about shooting models, making me a portfolio, who would I show a portfolio, who would I sell the pictures?
I've done some test shoots with friends (who didn't have a clue how to model) and I've gotten some, if a little, usable shots, pic related is an example of me fucking with lights that I think came out decent
should I go to some other (female, more attractive) friends and show them some pics I've took and ask them "hey wanna model for me?" or what?
I really have no clue so I'd appreciate some inputs, thanks a lot.