Generally speaking, the jump shot is transmitted to the ball by the strength of legs and feet in whole or in part, plus the auxiliary strength of arms and wrists to provide the ball with upward and forward movement. The direction is mainly controlled by the arm, and the downward rotation force of the ball is provided by the wrist.
Pay attention to the vertical arms, open your fingers as far as possible, press your wrists down, and start your legs in one go.
A "dry jump shot" is a sudden jump without preparation (such as dribbling). In the air, we mainly rely on the strength of arms and wrists to adjust the direction and complete the shooting. The strength and flexibility of the back are very demanding. Generally, the arc is relatively flat, and it is not easy to score goals (of course, McGrady can score goals). Besides, it needs a balance between body and air.
You can have a try, but don't force it, so as not to hurt your back.