This is the thing, you may know the trick by heart on tramp but when on snow, you'll still shit in your pants because the confidence on snow has just nothing to do with the confidence you need on tramp. Don't get me wrong, tramp is good for orientation and get tricks more accurate.
But learning right on skis, well, I've experienced it several times, rodeos and flats and it so gratifying and you are so happy and above all, you get the right confidence for the right trick, and that confidence is precious for stomping.
Basically that's what I would say to my self when I was attempting my first rodeo (2 years ago). I was with friends who were much better then I was and then (i knew how to backflip/ frontflip/ lincoln) I went "so that's how you do it, ok, there's no fucking reason if I do the EXACT same thing as you it won't work".
Watching the trick over and over and over helps a lot (to me it does).