Teens How can I be more cool next year in my eighth grade year Its kinda long but I need help 10 points!?

Ok so first Off i'm a pretty cool girl I'm African American I dnt wear fancy stuff my hair is like neck length it's sometimes messy....I'm the type of person that can make you laugh and stuff like that but it's like some ppl that I hang out with judge me some days and some I feel like I'm just like a hi and bye person to them.Next year I want my year to be perfect, I wanna be the perfect person, because 6th grade I had to deal with obesity and getting made fun of, this year it' better for me I fit in more,and next year I wanna be perfect.The only thing is some times I can disagree with ppl and then they can get mad and then won't speak to me only sometimes......My point is how can I be more cool in my eigth grade year? How to get higher grades,get more better at b ball? How to get along with everybody, how to get compliments on clothes,and how not to worry about how ppl will judge me if I'm tryon to make ppl get to notice me...finally how can I try to get the whole school to notice me????? Wats the secret? There r some ppl that are awesome I fit in tge cool category...I keep my grades pretty good but how can I be awesome and also be a leader?