My ears give me difficulties too. You can try it out in a pool if you find classes. A divemaster finally showed me how to bend and twist my head while equalizing my ears to get my narrow ear passages to allow air to move around. Now I can usually manage a second dive when going out.
Same. But with a tank on so you can breathe, and a weight belt to help keep you under, you can focus on figuring out if your ears will allow it.
Just swimming or snorkeling with no weight belt, I struggle to stay underwater, and my brain has a hard time being patient with my ears, while I'm trying to paddle with one hand & hold my nose with the other so I can equalize.