Im a lefty and im goin to the 9th and im most likely gonna be playing the 3/2 but i cant form my jump shot?

Im 6'0 also or 5'11 idk but Its like every time i shoot one time it doesnt feel different from the last time and they say lefty's are sick at jumper's i just wanna live up to that so what should i practice on a daily basis? and should i wear a arm sleeve can someone tell me please i really wanna be the best and be the team leader & best one on the team. like kyrie irving hungry & humble !