Others already covered the marketing part so I'll say something different. Make sure that you treat it as a business. Invest into proper camera and set of lights. Find some photography courses online to educate yourself about equipment, proper light setup and see if you can improve your resolution, bitrate, details, color balance. You can get by with cheaper camera, if you'll add more lights. Use sunlight if you can to save on the lamp equipment. Aim for 4K, 60 FPS, with at least 20Mbps in a well lit scene. I don't know if there are any website-limits with this, like compression, so check that as well.
From the non-technical side, you can probably research more about skin-care and other methods of buffing up your looks on camera. If you are able to produce professional content and if your girl looks above average, you have a pretty decent chance at making great money. You'll probably need more than one camera, different camera stands, a body mounted camera (chest or head), etc... Big hint: make sure you don't talk or moan during your recordings, this is a complaint I hear all the time about guys who fuck on camera and can't shut up. The focus is on your girl and ideally the only thing you add to a scene is your crotch.

Another thematical complaint is not letting her finish you off. That is why she is there for, stop using your hands.
Improve content and I am sure you'll make progress. Content is king in SEO, I don't see why it wouldn't be in xxx clips. Too many people treat it as an "easy" job, where you don't need to invest much to begin and then produce mediocre content, earning average or below average income, despite the threat to their privacy and future prospects. Go all in or don't do it at all.
Diversify, don't only post on one site. Open accounts across the board and interlink it where you can. You'll find an extensive list if you google it but at the very list you should open accounts on OnlyFans and Fansly. Same rules apply as anywhere else. Always overdeliver on your promises to customers.