I'm on iPad and can't do links but if you read the main site (click on button above) three or four times it will give you a few ideas.  Main thing is you don't have to show your face at anytime, but you do have to be very discreet to go about business without being recognised.

The search button will also find you a mine full of information.

Good luck.

What to charge is the ultimate 'it's up to you' question.

Have a walk around, look at every man, and think 'assuming you were respectful*, what's the least I would want to be paid to have sex with you?' What's the highest figure? Charge at least that.

* Clean, on time, respects boundaries etc etc etc