trying to get deeper in the habbit

So next year I plan on purchasing a new bp so that in a couple years I can breed, but before I do that I was hoping to learn a couple things like how to properly sex a snake by probbing, and to make sure that I am properly popping. now I know that we all share information on here but I was hoping that someone in my area or slightly close to where Im at can actually show me these techniques first hand. but of course that may not be posible so any input is welcome.