good news for you, i use mostly stock binds for navigation, the defaults are always the best, and a few extraneous ones for launching applications and configuration and such.
yeah, play minecraft and factorio mostly, it's great. Opening a game in bordered with another window is a little goofy sometimes, but you can set that workspace to be stacking/tabbed instead of splitting, and that solves that problem, you can also just make it open in fullscreen if you want though. One of the really nice things is since it's a WM dealing with any sort of fullscreen operations are going to be pretty substantially simplified.
I have had a few weird input issues but that might be my config, i haven't gone through it incredibly tediously. I can highly recommend at least trying a WM if you haven't before, i3wm is quite nice as it's extremely minimal but mostly configured out of the box, you'll need ot do some minor config but other than that it's usable once installed.
WMs tend to be like that sometimes, they usually require some form of configuration, like sound, and more general system management, theming, etc. But if you're familiar with all of that, it's trivial enough to setup and get working.
Ironically i3wm is intended for multi monitor operation, i'm unsure if you can do virtual monitors, though idk if software limits that at all, you might be able to do that natively lol. I've been using i3 with 3 monitors for a while, it's super nice. Basically exactly what i wanted for my setup.
I am just getting started with i3. I think the issue was more with Manjaro Sway.
It's been a few days now without any issues on Linux Mint. I haven't done anything complicated yet, but it feels natural to open and move windows around, which is a great start.