Nice

Here are some of my default picks: Nobara, Fedora KDE, Linux Mint. Can’t go wrong with either

Finished my migration from Plex to Jellyfin

Installkernel doesn’t care about your init system, only about the bootloader. It happily works with grub so you don’t need to worry about it

How to kill a service speedrun any%

Fedora is semi-rolling, it’s got fairly up-to date packages

Yeah, any relatively modern used PC will be more than enough

My personal recommendations: Fedora KDE, Nobara or Linux Mint. You can’t go wrong with either one of them.