Scared for highschool any advice?

I never really fit in, in middle school i get average grades like bs and stuff i have brown hair brown eyes my clothes are preppy but with my hair its kinda rock punkish its really layered and its like red and brown and its kinda short the longish parts go down to my shoulders.In 8th grade i kinda lost al my friends because i changed soo much like litterally at the begining of the year i was this little girl that people just pushed around and i loved pink and wore like skirts and dresses everyday which isnt a bad thing i was just tired of being pushed around well i was popular but idk i just felt little and trapped so i changed like completly changed i tried skateboarding cut my hair and everything! but now knowone likes me im still nice and everything though, ive never been mean or atleast i hope i havnt! But im really scared for highschool whats your advice for highschool. what did you do your first day? how did you make new friends? who did you sit by in the lunch room? help??