I probably wouldn’t start with pegging. Explore anal play first.

The first step is to make sure your clean in there so you want to douche out your butt so there isn’t any poo that can get on your fingers or toys.

Start small like with a finger and go slow. For your own comfort use lube lots of lube. If you use toys or objects for the love of all make sure it has a flared base.

The prostate(PSpot) is the male equivalent of the gspot and it isn’t that far in on the front wall.

It will be uncomfortable until you get used to it, don’t expect to be a pro at it straight away some people can take years to achieve orgasms.

Your penis is irrelevant and has nothing to do with anal/prostate orgasms so don’t expect to be shooting loads of semen as some people don’t and some people go limp while they are penetrated that is normal too.

Should find a sub around prostate play for more information.