How to build and deploy web apps. I worked as a developer for many years (before becoming a product manager), but always in desktop apps. I still code for fun, but I never made the jump to web apps. Now with AI that's easier than ever, so I'm going to do it.
Python. I played around with it three years ago, and did about 30 Project Euler problems with it, but I've let that lapse. I'll work to pick that up.
I bought my wife a learn-to-draw kit for Christmas, but it's really a gift for both of us.