Taking off a ski is much more difficult, does not allow any cheating & may not be for everyone. It is very ski specific agility, balance, coordination & strength training.This is why the University of Colorado ski team coaches had us take off a ski & practice long non-stop runs. Like one leg balance squats while moving for minutes at a time.
Check the uphill policy at the ski area & if allowed, try renting nordic skate ski gear. Skate ski up the easy way, ski down, make turns, wash rinse repeat. Find the balance & you can link good parallel (& telemark) turns because Nordic skate skis are more like single camber & the boots have some lateral support. The gear will force good balance & movement because anything less is immediately punished
We frequently see skate skiers (including management) at Alta Utah skate skiing up the summer road & descending the ski runs. Get good at this, do lots of laps & you will be stronger & the alpine gear will feel like power steering.
Skiing is all about foot coordination & dynamic balance (balance while moving). So the more different ways you can challenge & grow these skills, the better & more versatile skier you can be.