What is the procedure for a brazilian wax?

im going in for a Brazilian wax on Friday , and im just wanting to know what to expect ? do you get to wear something to cover up or do you just go Commando ha ha also what positions do you have to get into ? is it embarrassing ? and does it hurt ? im a little nervous and would just like to hear back from women who have had this done , oh and another thing does waxing help prevent ingrown hairs or will you still get them