Also worth noting OpenRA openra.net if you want a FOSS variation you can try out for free - it’s a open source engine for the C&C Red Alert games.
May also be worth looking at the FOSS Warzone 2100 wz2100.net - If you’re on Linux, it’s likely in your distro’s package manager already.
Yes. Unless you have any problems, stick with it. It’s easy to use, it’s stable, it’s pretty well supported, it’s common enough that there’s a lot of advice available. You already know it and don’t appear to have any issues or complaints with it.
There’s no harm in trying some other distros on a live USB if you’re feeling curious, but there’s no reason to change for the sake of it. In case you weren’t aware, a live USB runs completely off the USB stick - so you can test it on an existing machine, and it won’t alter any installed files.
There’s a chance that with a very new machine with very new components that Mint may have a compatibility problem (by default it uses slightly older, more tested kernels or software versions) - you can normally fix this by manually installing newer versions, or using the “Linux Mint Edge” version (which uses newer kernels by default) - or by trying a different distro which uses newer kernels/packages by default.
Sometimes people get this funny thing in their head that Mint/Ubuntu/PopOS etc are “beginner distros” and after you’ve used them for a few years, you need to “upgrade” to a more complicated one - but no, for the majority of purposes, you can carry on using the one you like, until they stop making it, or you stop liking it.