The other side of learning about humanity and life through fiction and art is learning about physical reality through science and research (if you're religious, or into traditional philosophy, feel free to add them to the list). And as such, both in contrast and in mutual support with many of my other hobbies, I quite like common learning. Topics historical, mundane, small, neat and collectable, human, pragmatic and practical, scientific, avocational and so much more. To this end, I watch youtube videos and do simple reseach – most often by browsing Wikipedia, or just going wherever google takes me.
In the (near) future, I'm also hoping to at least try getting into other, more involved sources of knowledge... both leisurely (documentaries, general appeal books) and serious (purely factual books and similar). Funny how, despite having some grasp on how human/personal knowledge and experiences get acquired, worked into and shared through art, I'm pretty much in the dark when it comes to these aspects of scientific/empirical knowledge. Guess that's what you get when your educational system doesn't teach researching, sourcing and working with knowledge, and you fail uni on top of that. Still.. to think there's a whole another world of knowledge I've never properly seen into... exciting!
Finally, when it comes to my Wikipedia crawls, I also enjoy improving whatever obvious small errors, imperfections and poor translations from my language I stumble upon. Sometimes I get the urge to become more involved with editing and help develop my favorite pages, but that has always seemed so impenetrable. I don't really edit other wikis1, but I salute those who do o7.
1:
Other interesting wiki and wiki-like sites I've found include:
Tv Tropes, obviously
Liquipedia, for esports (go go Trackmania!)
wiki.gg and anything hosted on there (compared to Fandom, it's a godsend)
Wikivoyage, a sister project to Wikipedia focused on travel advice
The Fitness Wiki isn't really a wiki, but I've been using it for fitness info
The SCP Foundation and The Wanderers' Library, both hosted on Wikidot
AARoads Wiki, if you're really, really into roads (nothing wrong with that)
And since you've made it all the way here, let me show you to a special place..