I need help bettering myself, to put it frankly. I have the desire, and I know I could find the drive, I just don't have to knowledge.

To start off, I'm an overweight, socially awkward, high-school-senior female. I have very light acne and it's clearing up, but I do have mild scarring. I don't know how to put on makeup, so I only use a really light powder. I shower daily, so I'm really clean, but because of the weight and the acne, I'm not attractive, and I tend to not try on things to make me look better, because I feel hopeless. I'm too shy to know a lot of people, so I have a very small, but very close, group of friends, but I feel bad if I complain to anyone I know, so I almost never confide in them.

I replaced my shoes a few days ago, and I'm going to an actual hair salon (not the $12 bargain cut I used to get) on Thursday, but I don't know what hair cut to get (I was planning on just asking "what would look good?"), and beyond that, I don't know what else to do.

TL;DR: I'm ugly and insecure, what can I do to fix those things?