Try practising stationary more, because then you’ll find perfect balance between the nose and tail. Also try to lift your arms up to help you balance

A little goes a long way. Press down the tail very gentle. It will be enough.

Lean more forward. Not with your whole body just smooth and gentle with you hips. You can try it stationary or while riding.

As you push down on the tail keep in mind that the nose obviously comes up so for as much weight as you are pushing down, try to counteract that force by pushing down with your front foot just a bit so you can learn more control with your manuals

Try to level it out and when you catch your self slipping try to push down a little bit

You have to get balance on your board. Than it works

Put your foot down