Getting back into skiing, what should I focus on?

Hi All - haven't really skied since 2018, ended up buying new gear and going on a trip our west this past week. I used to ski a lot 20 years ago on the east coast, only my second trip out west. it felt great and I had a lot of fun! I took several videos, here's one on a fairly steep mogul run. I almost lost balance once, I think some of my bad technique and back seating was fatigue. Any suggestions are appreciated!