How do I fix my flabby droopy ass?

My ass is so ugly

It’s really flabby and like hangs low lmao

I need to fix it but I don’t know how. I am 5’2 119 pounds. I don’t carry weight in my ass so I have accepted I will never have a big ass. But I would like to make the one I have a little better lol

I cannot do squats. When I try them my lower back hurts so I assume I am doing them wrong? I have no idea

What other exercises will help tone it up? And how do I do a squat lol