I would get into some sort of skincare routine for acne; I had bad acne too as a teenager, and when hormones/time of the month happens it gets bad unless I'm on BC. If you are older, you could look into BC as well, it can help a lot.（ ´,_ゝ`）
I would avoid foundation unless absolutely necessary- foundation clogs pores and makes acne worse. Blush does the same thing, so I would just avoid that as well. Eyeliner and eyeshadow is fine.
I don't know much about your body but if you're lolfat just exercise, have a better diet, take care of yourself, yknow that sort of generic thing people say to one another.