I agree with everything Helen suggested.
Are you not offering full sex? If not you're going to struggle for customers. There is a market for oral only, but it's smaller and you should probably make that the focus of your headline and profile.
Make sure you're ticking all the relevant boxes. EG for oral there's oral, oral without (at discretion), oral without, and receiving oral.
When you first start you will get all the boundary pushers ringing you. They try it with all the new girls. Just make sure you save their numbers in your phone as "Wanted anal", "pushy twat", etc so if they ring again you don't need to answer.