Skin condition help!!?

so hi i have oily skin and i have a lot of pimples. When i was young it used to be clear until i went to seventh grade then it started to appear. When can i do to lose the lil scars and pimples. People usually dont see my pimples because my skin is tanned and they dont see it at all unless close up. What can i do to help it recover quicky i am now in highschool.