Something you can do now (while the water may still be frozen) that someone else touched on is visualization. The power of the mind is an amazing thing...
I'd been landing backflips on my trick ski for ~20 years, but I always did them incorrectly and 'butt checked' at the end. I've spent years trying to fix this, and devoted multiple summers to ONLY that trick (probably 15-20 per set, 4 sets a week!)
I thought I was trying to fix it, but really I was just reinforcing bad habits!
Then one summer about 5 years ago I couldn't ski (broken foot), but visualized the trick every day.
The next spring when I hit the water, I landed the second one I tried perfectly for the first time ever!!
Do some googling on visualization for a better explanation, but here are some hints:
Recreate as much of the experience as you can... Try to imagine the sights, sounds, smell, feel of the wind on your face, pull of the rope, etc.
Try to visualize from an 'internal' perspective. Like you are seeing the experience through your own eyes, rather than watching yourself ski from some external 'camera' view.
Like anything, visualization is a skill and you get better with practice. Don't be surprised if you can't visualize yourself skiing correctly at first. Start with something easy at first like shooting free throws in basketball... Don't be surprised to see some bounce off the rim before you start to sink them! Really!
Good luck.