I'm not sure whether i should post this here or in te Jump section but anyway,

i'm trying to learn the ally-oop, i seen others do it like professionals so i tried it but when i grab the ball wit my hands, i either grab it too low and fail to make it or it is too high. anyone have any instructional videos or any self learn mehods?

and should i grab the ball in midair like a shooting position or do a 2 handed shot?

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age: 13
height: 5"2 / 157cm (dream height 175cm)
weight: 80 pounds/ 35kg
standing vert: 24 inches (never trained before)
running vert: 25 inches (same thing above)

aim:
1.standing and running vert 30+ inches
2.get the vjb
3.become a centre in my school team cos the tallest centre we have is only 170cm ... dots