I just finished Brandon Sanderson's Writing Science Fiction and Fantasy so looking for more to dive into for a few hours a day.
https://www.youtube.com/playlist?list=PLUl4u3cNGP61FVzAxBP09...
Should keep you occupied for a few hours. Mostly approachable.
PowerPoint programming by Tom Wildenhain. He does not use VBA macros, just shows that PowerPoint transitions and slides are Turing Complete.