At the end of the day - if YOU want to do it, then you surely can.
But
If you really hate the work and are only doing it for the money, then don't do it. It will mess with your head and punters will sense it and you will end up with little business. Go get a job in Woolies. (Same advice for a Doctor or a Lawyer or a Taxi Driver!)
Age, dress size, etc are less important than a pleasant, cheeky attitude. If punters feel that you want to be there, then they will return.
My preference if for 30 yr old, size 8s, but one of my regulars is a 40s, size 14. I go back because she smiles and laughs and hugs me like she means it.
Good luck - and pm me your ad !