surgery in Brazil
I have coworkers who are in Brazil right now, have just started their schedules of regularly flying to Rio. There was no problem with the travel at all. It's a long flight, that's the biggest problem. They fly alone and are working in Rio alone. They only speak English as well. I think you will be fine, especially since cosmetic surgery is so common, they are set up to take care of you and the fact that you only speak English.