Most of the Paradox games support Linux natively. I play Europa Universalis 4, Stellaris, Crusader Kings 2 (haven’t bought 3 yet but it has native support), Hearts of Iron 4. Victoria 2 doesn’t have native support and I didn’t get Vic 3 but it is supported. Rimworld is native, so is Factorio.
Have a look at what you want to play on protondb.com and figure out if gaming on Linux works for you. Baldur’s Gate 3 has a gold rating (gold being one level lower than platinum - the best rating for non-native games) which for all practical purposes should work.
EDIT: I recommend installing Proton Glorious Eggroll in addition to the native Proton on Steam if you can’t get a game running with the native Proton despite protondb reports saying the game works. The installation is fairly straightforward, just read and follow the installation instructions on the page.
I’ve been using KOReader on my phone now, ever since my Kindle one day decided to be unrecognisable on my computer. Couldn’t find a solution to fix it so it became a glorified paperweight.
The screen real estate is slightly degraded, but fuck if I give Amazon any more of my money. Besides, I get to store epubs as epubs instead of converting to that god awful mobi format.