How can i be more "stylish"?

Ok, well i am 13 and going into 8th grade. I guess you would say that I'm 'a weird girl'. I LOVE to read. Usually during lunch i just go and read, and i have very few friends, like, one. I think i need help finding clothes that look good and fit me. I am 5' 8" and weigh 175LB( I am trying to lose some weight.) Where should i shop for stylish but affordable clothes? Also, how can i do my make-up and hair so that i look good? Usually i just wear foundation and blush but sometimes i also wear mascara, lip gloss, and eyeshadow. My hair is brown but has a goldish tint when its just been washed, and people say my eyes are yellow/gold. I have light tan skin.Thank you!