Have your front foot at an angle that works best for you. When I first learned them I had it pointing straight up at the nose almost, right behind the bolts. They were pretty ugly.
I honestly like trying to do them at deferent spots of the board but I'm most consistent doing them when my front foot is bottom bolt, heel side.
Find a spot on the board and foot angle that's comfortable for you. Before you pop focus in on that heel side corner of the nose. See your foot flicking off that part. Pop, flick that corner with your toes and watch for that grip tape, and stomp.
After you get somewhat consistent think about how you feel when you do them. Where are your feet landing? Are you barely holding on when you land? Can you do them with speed? At this point start tweaking things to see if you can control it better/pop better.
Part of it is getting your ankle in the right condition. I.have a wider board and sometimes my ankle doesn't have the strength to flick it all the way.
Have fun homie!!