what do i need in order to get good in basketball besides height ?

Being 5'11 isn't that bad for basketball, you'll probably be limited to playing point guard so knowing how to dribble well & make good passes would probably be your best bet, as well as learning defense. You could be a player that scores a lot but you'd probably get blocked on a decent amount of shots.

you need to do the right workout

dribbling exercises i would practice dribbling tennis balls in both hands as well as normal basketballs. get the best handle in the world then also practice shooting. you don't have to be a freak of nature like LeBron to be good that's for sure

ten thousand hours of repetition, that's what I can tell you.

practice man. practice practice practice. watch film and practice some more. find film on smaller players and see what they do well.