Fat Guy Beginner Skiing Tips, follow-up

Previous Thread: 5'10" 350lb. Determined to ski. Company trip to to Okemo in March and I want to impress with my skill. Looking for any tips/tricks.

Update: Didn't "have more fun in the lodge" as previously suggested. Went to Mount Southington CT. Bunny slope wasnt steep enough to gain enough speed for turns. Pizza won't stop me, pizza is how I ended up here. They have a beginner lift that takes you up to a still shallow, but longer hill that allows me to get enough speed to practice turning. This is where I got to in the video. Never fell while on this hill.

Took the lift to the top of the mountain to go down the green trail. Panicked, froze, set a land speed record for green trails before flying off into the snowless woods. Forgot everything I had accomplished on the beginner hill and locked up in fear. Made it down but fell 4 times and called it a day. I ended up way too fast ended up with feet spread apart in a power stance and turning was impossible.

Still hell-bent on figuring this out. Please critique what you see in the video. How can I do better? Obviously I will be sticking to beginner trails until I have mastered them and not listening to my buddies that convinced me to go up to the top prematurely.