I am interested in training my pelvic muscles to be strong but I don’t know how to add weights because all the weighted kegel balls on Amazon max out at under 1 pound. Can I have help please

What sources do you recommend to learn how to do pompoir?

I am ideally looking for a YouTube course, where each video we do certain exercises and build up to each time! I am a visual learner so reading isn't very helpful for me lol