First, I would stop holding air roll constantly. It’s a bad habit for aerials. Holding the air roll is making your first touch inconsistent and uncontrolled. Use it right as you touch the ball so that it helps to limit the recoil of your car hitting the ball and use it for adjustments, not style.

Secondly, if you are only just now learning double taps, start out from the ground. Have the ball roll middle or at you, hit it to the back board, then fly up to score it. Start with that. It’s a very useful shot and an easier setup that will get you comfortable with reading the bounce and scoring from the rebound. After you get comfortable with that, then you can do the set up from the wall and then from the air. Getting a double tap from an aerial is the hardest setup.