^^^Agreed

I dedicated a whole day to just waterstarting.
A good drill to do is once the rig has lifted you up and you're pushing forward, just drag your front leg through the water for a while. This will help you obtain that balance needed. Worked for me.
The hardest part for me was when the clew sinks. I just swim the board and rig into the breeze and when you lift the sail out of the water, lift it up and forwards/over your head. This should get the wind under the sail and the clew free from the water.