Watching someone else do the trick (youtube) or at the Park is a great way to see how it is done.
Then once you see it being done, try it yourself on a trampoline. It may take some time to actually land it, but as you are trying it, notice where you land, and try harder to rotate faster or slower depending on your landing position.
Then go out with your skis on a powder day, make a nice poppy powder jump and try your new trick.
Once you successfully land it into powder, you're now ready to land it in the park.
Dont over think it because if you over think, you'll most likely psych yourself out.
Has happened to me alot!!