Nvidia doesn’t like Linux desktop users. The situation is getting better, but it’s still not great. If you stick to the mainstream distros (Ubuntu, Fedora) and officially supported game stores (Steam), you should be totally fine. Other distros and game launchers can be a pain, how much depends on how experienced you are with computers (required skills ranging from “editing text files” to “knowing the difference between DirectX and Vulkan”).
If you have a leftover PC, you could consider taking a look at one of the SteamOS forks and turn your PC into a living room console/media center, especially if you have a decent collection of Steam games already. After installation, you can control the entire system with just a controller, and with a little messing about you could add streaming services such as Netflix to it as well.