I think that you were quite strong to get out of a bad relationship. Many women aren't as lucky as you. I think that is amazing it itself.
If fixing your teeth makes you feel good go for it. I wouldn't worry about men for right now, don't look and they will come. As long as you are comfortable living at home (you don't get nagged at from your parents) go for it. It's an excelent place to save money, and get your spirit up. You should do what you need to to make yourself confident, and wait till you are there so you don't fall into another bad relationship. There are many people out there to talk to as well, and they don't have to be professionals.
Talk it over with your parents too, make sure they understand your goals, it will help as well!
Oh, and I know men who like teeth, and they'd rather have someone with braces

and a good attitude! Men aren't so stuck on beauty as you may think!
Yes, I am too a list maker, like Belle. So I agree there.
Hope things go well for you!