Get clothes conscious!!
Watch TV, look through magazines, spend an afternoon at the mall trying on things that flatter you and fit your personal style. Don't wear anything baggy, dumpy, or that has odd coloring. Get some mix and match items to change it up. Buy a few nice things a season, and add to it with off-season specials for wearing a little bit the rest of this season and having for all of next season. If I buy a hard to match pair of pants, I try to have at least two tops to go with them. Simple jewelry and a nice watch (like one that looks like a bracelet - stay away from a black or brown band) sets off your outfit, too. Also, learn proper etiquette to feel more feminine. Get a couple books at the library. When I started paying attention to etiquette several years ago, I found there was so much I didn't know! In addition to clothes, hair, make-up, persona can say a lot.
I have a friend like you: curly hair, short, and "chubby." But she's a doll! And she does things just like you--15 minutes and out the door. You are just low-maintinence people, and that's okay. I personally wish I could get out the door in 15 minutes, but my whole day goes so much better if I just take the time to properly get ready. Good luck.