....Not really sure where I'm going wrong in not being able to angulate further into the turns. Feels like I'm very upright and
I don't know what I'm doing with my inside leg. What should I be doing with my torso?
Leaning forward? Leaning towards the side? Just
moving my legs outwards like
this video?
You say you want to be "able to angulate further into the turns." I think you mean you want to get your hips farther inside the turn with skis on higher edge angles than you can get now. Is that right? I'm going to focus on that goal and specifically on your words above.
1. "I don't know what I'm doing with my inside leg."
This lack of attention to the inside leg is a major issue. You need to use that inside leg to start your turns, to direct pressure to your outside ski, and to create your edge angles. So you definitely need to know for certain what that leg (and foot) is doing if you want to get your hips farther inside the turn with edge angles high. More below.
2. "Just moving my legs outwards like in this video?"
You should not be focusing in moving your legs outwards. When you move both feet outward, you will end up with too much weight on your inside ski and too little on the outside ski. That inside leg will be long since it is reaching outward, and it will have significant weight on it. This will leave the outside ski with too little weight and unsatisfactory grip. Also, that long inside leg will block your outside leg from tilting over far enough to give you the high edge angles you seek. Instead, you need to do different things with the inside leg and the outside leg. These two different things need to start as the turn starts. More below.
3. "What should I be doing with my torso? Leaning forward? Leaning towards the side?"
The torso's task is two-fold. It can tilt outward laterally to direct pressure to the outside ski, and it can be positioned along the fore-aft plane to keep you from having too much weight hovering over the backs of the skis. Where you focus that torso's mass depends on how wide the turns are, how fast the tempo is, which part of the turn you're in, and other things. So the answer to this question is "it depends."
4. You haven't mentioned what to do with your ankles. You need to "dorsiflex" both ankles so that your lower legs extend up out of your boots at a forward tilt relative to your skis. Keep them that way. The direct way to accomplish this is to lift the top of your foot upward towards the top of the boot. An indirect way to accomplish this is to pull both feet back and hold them back; do not let your feet reach out ahead of you. When you keep your ankles dorsiflexed while holding the feet back, your body weight will be focused (as it should be) under the arch, right where the tibia connects with your foot (not under the ball-of-foot.)
..........
So what to do with the inside leg? Bend the new inside leg (it's the downhill leg before the new turn starts). Do not bend the new outside leg, just the soon-to-be inside one. The more you bend it, the lower that side of your pelvis will drop to the inside of the new turn. When the pelvis drops, that means the hips get closer to the snow. And your edge angles get higher.
People upthread have mentioned lifting the tail of that ski to start the new turn. This is a good drill. It teaches your to bend that new inside leg. If you lift the tail (a little) and keep the tip touching the snow, all of your weight will go to the new outside ski, that side of the pelvis will drop, both legs will tilt sideways, and your skis will get lifted up on their edges. How much you bend that inside leg as the turn progresses determines how big the edge angles will be. *Sliding that new inside foot slightly back as you bend the leg helps avoid back seat problems as the turn develops. *Tilting that new inside foot to its little toe edge as you do these things helps get that inside ski up on an edge angle that matches the outside ski.
Outside leg action is not the primary factor in how high your edge angles will be, nor how far inside your hips/pelvis will go. It's the inside leg action.
As for the torso, you tilt it fore-aft and laterally in such a way that you don't fall over sideways, nor end up in the back seat. Stated more positively, you lean your torso outward enough to hover weight over the outside ski. And you hover your torso fore-aft over the skis so that you can feel the shovels and tails both engaging with the snow. Dorsiflexing the ankles is an important part of accomplishing this fore-aft balance.
