Have you ever been discouraged and how do you not let that prevent you from giving up?

Listen I know I'm not the most attractive person but I've been concentrating on fixing the things that make me unattractive. Which is having problem skin. So I've tried to eat right, drink plenty of water and get excersise. But then eating right can be really hard especially when I've never done it b4. Then I drink lots of water and they say it's supposed to make ur skin look radiant and everything and it's been 2 weeks and I've yet to see results. And I'm hesitant about working out because I feel I may lose weight I'm already skinny enough. Then you see all these beautiful ppl w/ there