I'll probably go with Kubuntu just because I want something as vanilla as possible with the largest support-base.
I'll probably go with Kubuntu just because I want something as vanilla as possible with the largest support-base.
As a bonus, if you don't want to build everything from source, there are prebuilt packages available. Instructions for how to use them are in the "Installing the base system" section of the Gentoo Handbook. I've not used the Gentoo-provided prebuilt packages, but I do use my own prebuilts. I've found the process of using them to be well-documented and fairly straightforward.
https://www.fedoraproject.org/kde/
Ubuntu based distros are fine too, but there are a few weird things to get to grips with like Snaps.
There's really not much difference between most distros these days so I'm sure if you like one you'd like the other.