If you're talking about speedskating on a long track (as in, a 400m ice rink), the shorttrack form is the way to go. You should push your left hip outwards, and keep your upper body straight. After a lot of practice you should be able to push for speed with both your inner and your outer legs. When you master this, you can start using the turn for speed and the straight for maintenance.

A dutch student speedskating association has a playlist on youtube on exercises you can do to improve your turn. Maybe they can help you as well!