Kegels???

Who has done them? Did you use balls? Are you supposed to feel it, the ball? Coz I didnt. 😐 once it was up, it was like it was never there. Im like how the heck is this supposed to help??? I just need to strengthen down there, I think 🤔 after having a baby, but I was like this even before so idk... Is it normal at 30 to not be able to jump on a trampoline without needing to or peeing a little? I really want baby #2 but am scared that it will just get worse and ill end up incontenant or something if I dont tone up. Ive tried the pretend to hold you pee thing but if Im just pretending then I cant do it. Um help??