I got into it a few years ago, I tried the young and they were clueless how to break my ass in so I tried the more mature and again it didn't happen. The problem with trying pegging is you will be nervous about the pegging and if you're not a veteran punter nervous about the punt and she it unlikely to get even a finger up your ass in your allotted time. I blew a fortune getting no where...
My advice is buy some lube and some anal toys of varying sizes and practice at home. Once you can slip a "normal girth" dildo up you ass hire a pro to peg you! It's amazing if she knows what she is doing. Even better if you get a FFM and are ball deep in pussy while getting fucked up ass.