toss a linux distro on an old pc if you have one and play around with it. maybe put a few older favorites from steam onto it and see how it works (the older the better, more time for compatibility to be worked out, and fewer resource needed on an older computer).

worst case scenario, you can usually install linux onto a new computer with a few tweaks to bios/uefi settings. I've personally never run into a computer that you can't get to run linjux without changing some settings, but it's possible there are some out there.