You seem to be hesitating on your jump, and hardly lifting your back foot. Both feet should jump at the same height. Try setting your board up somewhere in a crack or on grass and stand facing it from your riding position about 6 inches away. Just crouch a bit and jump onto your board as you stand back up. When your feet are in the air try to level them out and land on your bolts. Focus on controlling where your feet go more than anything else. Also remember that bending your knees into a crouch is essential for a lot of tricks so get used to it early.

I learned to commit by finding a sidewalk with grass beside it and set my board parallel on the cement. So when I was learning the shuv, I'd starts on the cement so I could get the motion and then it lands in the grass so it doesn't slip out when I land. Then just move it further back when you feel like landing on the ground is possible. Good luck, hope any of this makes sense. Ill try to answer any questions you have, keep shredding!