>steal some instruments, play them poorly, call it "jazz"
Listen to A Kind of Blue or Giant Steps, just to name a few examples, and tell me those were instruments played “poorly.” Also, I hope you don’t like any rock or country music, because we wouldn’t have had either of those without blues.
>get allowed to play on sports team
You do know they WEREN’T allowed to play on the same teams as white people for quite a long time, right? Fun fact, though: in the history of Negro League baseball, their teams actually had a winning percentage when they played against white teams.