Linux

1. The various versions or flavors of Linux are called "distributions" or "distros." There are several that are intended to be ready to go out of the box. Linux Mint is a pretty good one for general desktop use though they're kinda behind the times with Wayland and such. I see a lot of folks recommend Bazzite but I personally know nothing about it. I'm using Fedora KDE, Fedora is meh, KDE is pretty good.

2. If you're building a gaming desktop specifically for Linux, I recommend going with AMD GPU and an Intel wi-fi adapter. There are some Wi-Fi adapters that don't play nice with Linux but Intel's drivers are pretty good. AMD releases their drivers right into the kernel, there's nothing you need to do at all to get AMD GPUs working on Linux, Nvidia is a bit more of a pain. Also, with desktop peripherals, avoid anything that needs one of those configuration utilities, they tend not to be available for Linux. I use a Coolermaster MasterKeys Pro M keyboard which all configuration happens on the board, they don't offer any software for it. Highly recommended.

Oh also: Asrock's RGB lighting weird and non-standard. If you want to use open source stuff to control your RGB lighting and that's important to you, I recommend against Asrock. Just so happens my build's RGB is controlled via a controller built into my case.

I personally started out with Debian given that a vast majority of distributions are Debian based, typically paired with KDE Plasma 5 for my desktop environment, and learned from there.

Now Debian is really stable but does require command-line configuration quite often so it may feel complicated but if you’re capable of reading & following documentation then you should be all good.

Imo you should get a System76 computer, it comes with a gaming focused Distro and its the most well respected Linux brand (in the US, for EU I would reccomend Tuxedo). Their mini PCs cost $799 and for a decent full sized PC (with a GPU) prepare to pay over $1.5k.

Using Linux since 2008 ish.... (As non IT user), I recommend going and route, and using pop os (or bazzite which people say also works well but is personally haven't tried), I am currently using tuxedo os on my laptop but my pop os journey for your use case on the home machine has been the smoothest, and if you go do route which I did, I had never thought about any driver issues.... The only thing in pop (which I haven't updated for a year now, yeah life got crazy), was that always do apt get updates / upgrades as pop OS's package manager gui used to get stuck sometimes, once the terminal completes the updates then use the GUI to update the pop os things. Other than this small hiccup, never had to do anything else. (Oh yeah when buying hardware some people told me that getting the latest and greatest cutting edge sometimes takes time for the kernel to catch up to the optimizations of drivers, but I always bought 1 or 2 gen behind the latest and never had any issues, I mostly play Indy games other than 1/or 2 like Tekken series at 2k monitor so I never cared about 4k 120 or above fps.)

Just deleted my windows parition and grew my cachyos one, im never going back after a week with it, I like cachyos/arch since I can use gnome and plasma at the same time easily (i like swapping looks a lot), idk if its as easy with others since they reccomend you rebase for different des like bazzite, aurora, bluefin. cachyos is straightforward with a gui installer, easier and much faster than windows to install and use, I used ventoy so I can keep using my usb for data.