You're right that your rates shouldn't be up for discussion, but I fear you'll get very, very, very few clients if you insist on asking for a face pic first. I don't show mine, and I'd never dream of asking for one.
I would finish your profile ASAP and say everything you want to say on it, and then gauge how you'll get on with the client - and if you want to see them - in a phone call.
Finally, I don't mean to sound harsh, but sex work isn't a job for sensitive snowflakes. Your sense of worth and self-esteem have nothing to do with how much you charge for the hour or the services you provide. You're going to have to deal with a lot of idiots, criticism of your looks etc.