There are videos online showing how to properly probe a ball python. If you honestly have some good common sense, and feel for smaller tools/instruments, you shouldn't have a problem probing a snake. I recommend beginning on adults with proper probing tools, of the appropriate sizes. Use KY and inserting the probe never involves force. Be patient and gentle. Obviously if you lack what I previously mentioned, than take it to a vet or breeder. Everybody has to learn somehow... watching a video is really no different than watching someone live, except for the fact they can't say "NO NOT LIKE THAT!"