Heels, heels and more heels. Open toed sandals, open toed anything. Shoes, feet, heels, stilettos, platforms. Feet are always better with legs IMO, soles of feet next to a nice butt (lay on stomach, bend knees), with panties, without. Feet on dicks, toes in mouths, female/male tongues on toes, toes in VeeJay, Knees bent so feet are next to VeeJay. On OF you can do foot jobs, Possiblities are endless.
Monetizing - OF takes a big percentage, for processing your money and sending you tax forms. I've not seen them actually help generate traffic. Try your own website, send pics for ca$happ, etc... Add your website to all your "ad" profiles, tryst, PD, etc...
Try searching google for feet pictures, best feet pictures, sexy feet pictures, monetizing feet pix, see what's out there and how they're doing it.
There are several 'build your own' websites out there. Keep it simple, a few samples, cashapp and private email/text. Take customer requests, traffic should come from 'ad' profiles, I always check out a woman's website, always. Not always OF because the OF profile page doesn't really show anything unless you pay.
If OF is too cheap, you won't make money, if it's too much, I'm saying F-that and moving on. Give a free 3 day trial or something.
A bunch of competition out there, stand out, by creativity and being nice to the simps (customers).
Had to check it out -
https://fixthephoto.com/feet-picture-ideas.html a few ideas just googling.
https://thesavvycouple.com/how-to-take-feet-pics/
My personal opinion - Feet are okay - I'd never pay for feet pics. I like feet and sucking toes when they are attached to a beautiful woman, add some stilettos and I'm done.
DM my consulting fee.