Form for what? Shooting? Defense? If it is shooting your elbow must be in and you opposite hand must be on the side of the ball. You shoot only with the one hand, using the opposite hand to support the ball. Your release must be up above your head and have follow through. This will get the proper spin on the ball. There are some good videos of that online and they have a ball designed to help you get the proper form for shooting.

Good Luck.

Coach Brown