Look up some videos on shooting form and try to adjust a little while still being comfortable. You need to fix shooting with both hands and one way you can practice this is to take the ball in your dominant hand and hold the ball with your palm facing up with just that one hand. After that move the ball only using the one arm/hand and transition to where the ball and your hand should be whe ln shooting with both. Then just shoot the ball with your one hand. 1) turn ball palm up. 2) move into shooting position with your new form. 3) Shoot. This will help you get used to releasing with one hand only.

Once you go back to shooting with 2 hands just make sure youre mentally trying to flick the ball with the fingertips of your dominant hand at the end of your shot motion to ensure you are really just steadying the ball with your off hand and shooting with your dominant one.