My #1 distro recommendation would be Fedora Atomic (immutable Fedora variants).
It’s still a bit “underground” and hasn’t reached huge popularity yet, but I see its potential that it will very soon.
I have ADHD too and Fedora Atomic is a lifesaver. Why?
You can “distrohop” anytime you want by rebasing. With that, you basically swap out the OS with something else (examples will follow), but keep your data and some settings. If you are on Fedora Workstation (Gnome) and want to have KDE, installing and removing those packages is a huge huge mess. On the OSTree variant, it’s just one command, 5 minutes of waiting, and bam, you have a clean install. I do that all the time.
Less bugs and better security by reproducibility. Every install is the same.
Very quick rollbacks if something did go wrong. You can’t brick your OS, which I did a lot before.
Huge choice. See at universal-blue.org , it provides vanilla images with some quality of life changes, as well as custom ones, including “unsupported” DEs and spins, e.g. a gaming distro. They aren’t forks per se, they are basically build scripts and maintain themselves, which is why they’re always up to date and way better than Nobara for example.
Distrobox pre-installed: you can just create an Arch container and use the AUR from it. So you don’t need to run (and troubleshoot) Arch on bare metal, but can comfortably benefit from all great things Arch provides