I learned it recently. My tips:

Clipped out/on the reverse side of clips. Pretty obvious...

Standing, no problem if you start to lean forward while you are going

Practice trackstands. My best trackstand is right foot forward, wheel turned right. That's where I start the circle from, so halfway I get to a left forward, bar right position. To be able to ride through that, I found it useful to practice left-forward, bar-right trackstands.

Don't practice more than 20-30 minutes at a time, then come back to it the next day. Being obsessive just frustrates you and your upper body gets so tired you keep doing it worse and worse. Plus I seem to remember that sleep helps muscle memory things sink in properly.

Try not to be stiff, but relaxed and confident