From the first clip, compare your body posture with the other guy.
See how he's relaxed, extended and stacked over the front foot where you're bending from the waist.
Try some Bosu ball and surf skate practise to work on your posture and you should find things improve 👍
Commented on I’m working through the 12-week surf ...
20 Dec 09:26
That's pretty good 👍
You should already have encountered the Bosu ball drills and you'll have the Cardboard Slide and Surf Skating coming up which will help you work on compressing and extending.
You have a nice foundation to build on, just relax, lift the elbows and stack over the front foot 🙂