Do you have a breeder in the area that you can meet up with. Most breeders are pretty friendly and willing to sex your animal if you bring it to them. Just don't be surprised if they ask you to meet in a public place. I would really meet up with a breeder so they can show you and teach you in person. Popping and probing are both dangerous if you do it wrong.
If you don't know a breeder, put up an ad on craiglist asking for help. There has got to be a breeder somewhere in the area. I keep an eye on CL and have met up with people that wanted their bp sexed. Even if they don't watch CL there's likely someone in their life that does. There was an albino bp on our local CL and you wouldn't believe how many people told me about the ad and told me they watch for bps just for me, lol.