Since you have experience with Mint, why not go with Debian with KDE Plasma? I have it on my laptop and it’s Debian, old reliable, I like that stability on a laptop, so that I’m less likely to have issues on the go. Debian isn’t the friendliest distro to new users, sure, but if you can figure out Fedora, you can figure out Debian.

Oh yeah, KDE Plasma is where it’s at. I love the DE. Glad you found something that works for you!