If you want to practice jump shot, you must practice waist and abdomen strength. Bouncing is not the most important.
If you break through to the left, it's best to dribble with your left hand, brake with your left foot (the left foot jumps hard, but the right foot doesn't), and then transfer the ball with your left hand to the right hand for shooting. Your legs should be parallel at this time. If you don't understand, pay more attention to McGrady's left jumper and learn from him. If you break to the right, your right hand will break to the left. It is best to dribble with your right hand, brake with your right foot, and then shoot. You can also jump directly without stopping your right foot, swing your right leg to the left, and your legs are scissors-shaped. Kobe often does this. Pay attention.