The First turn is always hard, so don't beat yourself up over it.
The simplest way to get moving is to progressively flatten the skis to the snow surface. This allows you to accelerate your whole body in a controlled way and allows you to choose where to start making parallel turns. It's an old patrol move that you will see used when they are starting down the hill with a loaded sled. Basically they do this because pushing the sled uphill is almost impossible. The primary benefits of this move are,
- it is a controlled release,
- it's very stable (needs to be in this example)
- and gets you moving in the right direction (downhill).
- From there the rest is pretty easy because once you have created some downhill momentum you can resume turning like normal.
Inso far as doing a rotary push off to get started....well at the risk of offending others I disagree with it as a good tactical choice because it requires an uphill projection of the CM before moving it downhill. It simply is not very efficient. Additionally, in a tight trough you might not have the room to swing the tails uphill.
Of course the gonzo way is to jump downhill and land in the fall line. Figuring the rest out on the fly. It's not for the faint of heart, or the weak in the knee crowd.
What both maneuvers share is that you get the torso moving downhill before worrying about turning. If that includes a wedge that develops because the tips dive into the turn, who cares.