For example: https://phtn.app/post/lemmy.ml/26299109

There are a couple of other posts, you’ll find them quickly if you search for Pewdiepie.

LineageOS has instructions for Windows/Mac/Linux: https://wiki.lineageos.org/adb_fastboot_guide

Same. The dev is very active and open to suggestions. I’ve been using it for a couple of months now and it’s working great.

In Mint most people recommend installing Steam directly from the website as .deb. There are dozens of informative threads on the official forums, which also explain some differences of the installation method, for example: https://forums.linuxmint.com/viewtopic.php?t=427582