
Look up the Emperor and his origins which also leads you into what the Immaterium/Warp is as well as the Astrnomicom.
From there you’ll go to the Horus Heresy to understand why things are messed up with some light reading on the various theologies that dominated the Imperium. As well this also leads into understanding what Chaos is, especially to the Imperium.
The Imperium isn’t just fascist, it’s fascist to the extreme with unending bureaucracy. Entire planets get misplaced in the archive as rounding errors. You’ll learn about Space Marines, the Imperial Guard from here.
Then look up the main Xenos factions. I recommend Orks, Eldar, and Tau as those are the current major players/antagonists to the Imperium. There’s more but those usually get more screen time so to speak.
Deep Rock Galactic can be played up to 4 players, but 2 is fine. There’s difficulty scaling to what you want to do and you have to want to play high difficulty content to access it. You go around various biomes, mining for resources, fending off enemies. There’s a multitude of mission types to play that can be fun to funny.
It was officially released in 2020 but was in early access for longer than that. It’ll run well on mid range PC builds and supports Linux though with the typical warning it might be a little janky until you get the right modifications going. The DLC in the game is cosmetics and you have plenty you can earn through regular gameplay.
A racing style game that you two can play around in I believe is called Wreck Fest. It’s a demolition styled racing game so crashing, smashing, and bashing are all encouraged. It has from straight racing to demolition derbies with AI.
It released in 2018 and should work fine on a mid-range PC, though might need to turn down some of the physics effects since there’s a lot. Its DLC is different cars which isn’t really pay to win as they have strengths and weaknesses to them. I’ve played it on single player and it’s still fun, with a friend would be wonderful.
If you’d like a rogue lite kind of game, there’s Teenage Mutant Ninja Turtles Splintered Fate. It’s a coop rogue lite where you build up power sets and see how they do. Can be up to 4 players but solo is very much viable as well.

You’re talking to me like I haven’t been through decades of disappointment and in other areas. Me cutting things off is the last straw and thing I can readily do. Be it someone who says “welfare queens should die” to AI used for media. I know you cannot rightfully get away from supporting Amazon or that you have a choice of a soulless, big box store to buy at anymore. Just because I have to do so to maintain my ability to live doesn’t mean I won’t try to inform others about it and get them on my side. I’m just less patient with supreme levels of bullshit anymore.
Thank you and have a nice day. :)