Any distro will work. I have tried bazzite, cachyos, endeavouros and had same experience with gaming. In all the distros lutris was common.
I am new to nixos too. As for flakes, it is little complicated at least for me. Vimjoyer video helped me understand little about flake. Here the link https://www.youtube.com/watch?v=JCeYq72Sko0 You can go through his nixos series. And there another YouTuber librephoenix. He has good learning material too. Here is link https://www.youtube.com/channel/UCeZyoDTk0J-UPhd7MUktexw
Not sure. But I have other primary laptop. And this laptop is just sitting so I wanted try something with it.
Any distro will work. I have tried bazzite, cachyos, endeavouros and had same experience with gaming. In all the distros lutris was common.