Relearning Mathematics.

Learning Python, C/C++, and HTML/CSS/JavaScript.

Learning about the Peer To Peer Web.
(Excellent resources: p2p foreverBeaker Browser, Peer-To-Peer-Web, Jon-Kyle, Dat Project)

Exploring Pure Data with patches by Martin Brinkmann.

Reading The Rings of Saturn, by W.G. Sebald.

Playing Pikuniku
Playing The Legend of Zelda: Breath of the Wild
Playing KeyForge
Playing Super Mario Odyssey
Playing Night in the Woods
Playing Inside