In a genuine way, just start doing ur makeup everyday, even if u don’t wear it out. Ngl I felt the same way and I was bad at doing my makeup, but just practicing and seeing what looks bad/good on my face, even if I just wiped it off after, helped me a lot. And I wouldn’t say it’s “becoming” pretty, something I’m working on lol, but more like doing my makeup makes me “feel” pretty if that makes sense.
Yeah it’s not about “fixing” yourself, it’s about feeling good about yourself. Different clothes, different hair, makeup etc are just ways u can go about it. You’re not ugly or not pretty, you just need to find what makes you feel pretty. In my experience, people just seem to look happier/have a happy glow when they dress like themselves, no matter what that looks like.