I want to feel beautiful/more pretty any tips or advice?

I'm a 21 year old female and I have always worn jeans a band tee shirt and over sized hoodies I never really took care of myself and well now I think maybe its time to change. I was just wondering what are some things I can do I now try and prevent my acne I just still feel ugly and need some tips and advice in the beauty and skin care area thanks ^___^