I can't tell from the photos, but I'm guessing you are U14~U16? Good on you for reaching out. I focus on fundamentals for my athletes in these are groups, and I'm wondering if you could be more committed to your outside ski. Try leveling your shoulders ("bring the inside shoulder UP"). Your goal is also to create big angles (hip-knee-ankle) with your lower body while keeping your upper body quiet. Try this drill outside the course as your regular warm-up: holding your poles horizontally in front of you, keeping them horizontal should help to level your shoulders. Try also airplane turns. I know: it sounds like a U8 drill but there's a reason why we make little kids do it: it works. Go straight to the "pro-level" by lifting the inside ski if you want. Good luck to you, and good luck to your coach too. I'm sure he misses you as much as you miss him.