How to look fresh for fishy year ;)?

Okay so I've been trying to lose weight but everytime my family or someone else brings junk food and i half to eat it so i half to double up my diet everyone keeps saying oh your not fat, i know that i just want better greater hygeiene, want new clothes hair and I wanna be popular in high school im in cheerleading so that should help me out, i was at the libray today reading about keeping your body healthy, so any great advice to get me in the habit of this, and I wanna have real flawless skin, i use baby oil and perfume lotion and oil to make my skin really soft, i just wanna look great before school starts!!