First off, the only way to change your face if you are not good looking is through plastic or cosmetic surgery. That's expensive and unnecessary, I'm not particularly good looking, I've never needed to be, and still had a wonderful life with meaningful relationships. If you want to change your physique, start eating good protein, fruit and vegetables, and ten glasses of water every day, this will help your concentration, skin complexion, hair and general well being.
If you want to improve your personality get interested in other people, having a great personality involves being knowledgeable but only when that need arrives. Ask questions of your friends, read the newspaper so you are up on current affairs, watch less television, it's not good at all good for you.