Hey, welcome to magic first off!
As far as practice goes, here's another suggestion:
Firstly, practice the move in front of a mirror for a while, then go and practice for a camera or a wall, where you can't see yourself - that way you won't be relying on the mirror to help you execute sleights, since you naturally get used to the mirror.
The other thing is, practice the effect, go through the entire trick. Get to the end, and start again, but this time, instead of doing a move, do what you would be doing if you weren't doing a move - for example, if your trick is as follows: spectator takes a card, returns it to the middle, you do a pass to bring it to the top, take a double lift to show that it's not their card and then do a colour change into their card, practice that. Then when you're done, do the same thing, except instead of the pass, just square up the deck. Instead of then taking the double, just take a single card. Instead of doing a colour change, just wipe the single card. Of course you won't find the original card, but it'll get you used to the motions, what you're supposed to be doing in the spectator's mind.
