What are some skills or subjects you’re largely ignorant about?

It can be as broad as “art” or as narrow as “calligraphy”.

Out of all your choices, what’s one that sticks out to you that you’d like to learn?

Here’s my list:

Chess
Settlers of Catan
Military time
Roman numerals
Printmaking
Architecture
Horticulture
Yoga

Out of all these, I’d definitely like to to learn more about strategic board games, and join a weekly board gaming group.