I'm learning bass guitar. So I'm learning the basics and playing easy songs like 7 Nation Army. I also have the Rocksmith game to help me.
I'm also culturing mushroom spawn to grow shiitake and lions mane. This involves learning about mushrooms, lab equiptment, and sterile techniques. Of course I dont want to buy expensive equipment so I'm homebrewing a lot of equipment like a substitute for a laminar flow hood, or using 4oz mason jars instead of petri dishes.
I've been super stressed by everything (young family living in NYC, no childcare). I've been working on an app in Flutter in the evenings, and it's been really cathartic just building something for the sake of building it.
For me - Cooking and furniture refurbishing
Making homemade bread, Italian food, various other meals from different cultures etc.
Asian cooking. Gained 10 pounds.
How option trading works and some self named guru do it.
Python, Computer Vision, Deep Learning.
None - but I am sure I'll have plenty more 'covid-19' time to learn something.
But seriously, I am just commenting to remind people that we're in a pandemic. It's okay not to come out of this with new skills.