It takes a real act of faith to lead with your head & shoulders diving into the abyss. That's what you have to do. Work up to it. Remind yourself...what body parts must be the first down the hill? Head & shoulders.
Some will say to get your hands forward. Yes, but...some skiers will be way in the back seat with their hands thrust forward for no help at all. Hands & arms need to be in the natural balancing position a bit up and a bit forward.
Work up to it. Pick the terrain where new good technique will be a success for you. All good skiing starts with the feet. As the first thing to do when transitioning from one turn to the next pull both feet strongly back. Get your feet behind you. This is the same as getting forward, and it is a way that is quicker and stronger than trying to move the heavy body forward. Just closing the ankle is great for small adjustments and not strong for big adjustments.
Don'ts:
Don't twist your body in the direction of the turn. Don't twist to face the hill. Twist your body to face the outside of the turn. (Counter)
Don't lean back toward the hill for that false sense of security. Lean way out, way down hill, for the true security that comes when your skis engage the snow. (Angulate)
Don't make a big arm swing to bring the body forward. Keep the body calm & controlled. Pull your feet back.
Without poles being gripped what can you do?
Ski with your hands on your hips, thumbs forward to bring the shoulders forward. This is great practice to help one see how their body needs to turn to the outside of the turn. This movement is counter rotation, a.k.a. upper & lower body separation, counter, and a huge help.
Ski with the poles held in your hands crosswise in front of you. Hands palms up, one hand on the shaft next to the baskets, the other hand on the shaft next to the grips. This can calm excess upper body movements and help one see how their body is tilting toward the outside of the turn, called angulation. The poles should be positioned by positioning the upper body, not by just moving the arms. When skiing across the slope your shoulders should be tipped to about the same angle as the slope, and your poles will reflect that angle of your shoulders.
Ski with your poles across your knees, tucked into the hollow just below your kneecaps. Keep them in those notches. Ski slowly across the hill, make turns, keep the poles in the notches under both kneecaps. This will really improve your angulation.