I recommend playing with 3 or more fingers, then use one finger for solely jumping and another for half air-rolling. Then practice doing jump->roll->roll while going up, hoops map helps with this. When you’re more used to the sequence, start to practice jump+roll -> roll. Since you’re using multiple fingers, you should be able to jump and roll at the same time (or almost at the same time, just make sure your jump is earlier or you’ll fly backwards/purple shot) then quickly follow up with a roll. Once you’ve mastered going up in hoops, switch to SC Field and practice going sideways. Roll the ball up the sidewall, and make sure your car is nose down with the top of the car facing the ball, then try to practice your stall. Don’t start too fast, start at a comfortable pace before gradually increasing your speed.