GreenTomato, you're heading in a very good direction. The front half and back half of your skis have different jobs. The front half controls you. The back half takes you for a ride, straight & fast. You engage the front half in the snow by positioning your weight, your body's center of mass, somewhere over or ahead of the toe binding. Actually, the most important part of the ski is the front half of the inside edge of your outside ski in a turn. Picture a pair of skis. Look at the inside edge along the broad tip of the right ski--this turns you left. Engage it in the snow and the ski turns you left. Engage it more firmly in the snow and you turn sharper. This engagement in the snow is caused by the position of your center of mass and how you edge the ski.
The Skier's Paradox--You need to be very aggressive in your movements to have the control to go as slow as you want.
Strongly engage that front inside edge into the snow to make a sharper turn to control your speed. On a steep, speed control comes from a tighter turn radius. The turn radius is established in the top 1/3rd of the turn. You need to get the round, tight turn established before your skis pass through the point of straight downhill--the fall line. This engagement is partly due to getting your weight way forward. Way, way, way forward as the slope drops away from you. You achieve this by very strongly pulling your feet back behind you. You can't get forward easily. You can accomplish the same thing more quickly and more easily using your strong hamstring muscles in the backs of your legs to pull your feet behind you.
You need to be on the balls of your feet all the time.* Almost every activity has the person on the balls of their feet, and skiing is the same. Hinge forward at the ankles. Don't squat to get contact with the boot tongues. This doesn't move your center of mass forward, and it's tiring. Hinge forward at your ankles, and use the pressure against the boot tongues as a gauge on how far you're out there. While moving, pull your feet strongly back behind you to get this forward pressure. Works easy. Stand tall with loose, comfortable joints. Don't squat, don't bend forward at the waist, just stand loose.
Step by step on an easy slope:
Stand tall, loose joints
Hands a bit up & a bit out in the natural balance position you body puts them in
Feet walking-width apart the way your body has been balancing itself since you were about a year old
Weight on the balls of your feet
Hinge forward at your ankles
Your zipper tab hanging forward of your toe bindings
Slide on the snow
Turn your body left and hinge forward at the ankles so your zipper tab is almost over the ski logo on the front of the left ski
Tip your right ski so your right big toe is up in the air, ankle tipping only, don't drop your knee or hip toward the hill
Lighten your right ski--lift it slightly but not off the snow--and tip it more
You're turning right!
---It really is this easy.
Release the turn by allowing your left leg to relax and flex slightly
Turn your body toward the logo on the right ski
Tip your left ski so your left big toe is off the snow
Allow your right leg to lengthen--don't push it out
You're turning left!
Add power to the turn by strongly pulling both feet back, way way back on a steeper pitch or for a sharper turn at the same time you release and flex the new inside leg
Strongly pull the inside foot back the whole time you're turning. This impels your body forward for correct balance. Very strong pull back for tighter turns and steeper pitches. This is like turning on power steering.
*two minor exceptions when you want to be on your heels---in deep snow so wet & sticky that you won't reach the bottom unless you sit back and keep the tips up, and momentarily when you're about to run up & over a ridge in the snow and you need to lighten your ski tips so you don't get thrown...push your feet forward just before hitting the ridge, then pull the feet back to re-center.