If you want minimal effort to get a good Linux setup for Steam, just buy a SteamDeck. Get the dock if you want to use it like a regular computer or console with a wireless gamepad. I did that -- hooked it up to my monitor, headphones, plugged in a mouse, keyboard, and my old XBox360 USB wireless dongle and it all just worked. I've got a few ideas for fun projects I want to try with it as a handheld and have written some software on it using desktop mode (little Python utility scripts for shuffling data around) but mostly I just use it like a gaming console; it works well for that.