how to become a foot fetish model

So I’ve been considering getting into it as my additional gig since I learned that one can actually make quite some money out of it. It is amusing because some of my girlfriends have always been praising me about my feet saying that they are gorgeous, have a nice shape, and are well-cared for. It never occurred to me before, but now after I saw mentions of foot modeling online I’m considering whether it might be suitable for me. I don’t have any experience, hence I want to know how it usually works and what steps one should take in order to become successful in it. Should one create a portfolio at first? What websites are legitimate and how many of them are there? Can a beginner actually earn some money through it or is it market already saturated?