You have to focus to go straight up. If you are setting the spin a little bit off that vertical axis it will be very hard to land it properly. Make a friend take a video of you so you can improve. Also try and look a certain spots when you're spinning so you don't get lost. For example, set the spin, spot asap the wall which was in front of you (about at 360) then keep spinning and reach the 720 with your eyes first.

Try not to swing one arm harder than the other. With more rotations, being equal makes a big difference

Before you land put your arms vertical and regain your balance in the air.

try and keep your body straight

U don’t have to jump really high to do it u only have to get the rotation down because if u jump high u have more space to get off axis and not land on ur feet

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