When Covid came to town I started learning French to do something constructive. I started with 1 hour+ Duolingo a day, then after a year I added comic books (Tintin/Asterix/Spirou/Natacha/etc.). Now I am reading the Maigret novels.

I finished the Duolingo course after ~3 years but they added more content so now I do ~15min a day just for fun, while most of my learning is through reading interesting novels, like Maigret.

I also took the ANUx's Astrophysics XSeries Program on EdX, it's spectacular and I learned so much from it. So I keep better up with new discoveries and understand what's going on.