Here's the truth. SOME providers truly won't care what you look like. SOME providers will care, but you will never know it. SOME providers will be disgusted, still fuck you, and the experience won't be very good for you at all. SOME providers will slam the door in your face. We're still dealing with human beings here and everyone is different. Money does matter the most, but you want to have a fantastic time too.
The key is to do your research and find the right lady. Also, be honest about your weight upfront so there's no misunderstandings when you arrive. You don't need to tell the lady you're a virgin either. I'm sure you've seen a porn or two, so it's not like you don't know what to do.