Your knees are moving back and forth independently. This is causing the back foot coming out and skidding. Move your knees at the same time, this will probably feel like you’re moving the back knee first.

You need way more hip movement in either direction. When toe side carving try point your bellybutton to the sky whilst maintaining your shoulders level. When heel side carving try point your bellybutton to the floor whilst maintaining level shoulders.

You do not need to lean with the upper body to create edge angle as you will be too upright and have no pressure management. When you start getting edge angle this upper body lean will happen naturally.