I was thinking of several of the topics mentioned here: Space, MCU, Pokemon, Unity (I have written 47 pages of documentation using the course material so far)
However, I am taking a refresher course in Scuba Diving to prepare me for a cruise to Australia in September/October (hoping to dive on the Great Barrier Reef). I haven’t dived in at least 12 years, so this will help me with the course material.