Don’t pick a whole distro based on the UI. The distro choice is about stability vs bleeding edge packages, package manager, minimal/maximal installs, security hardening vs convenience, use or avoidance of particular systems (e.g. systemd), and things like that.
The UI will come from your choice of desktop environment, window manager, compositor, etc. Those can be installed on most distros. You can also look at dotfiles for more theming. Ofc it’s silly to install a different UI on a particular flavor/version/spin of a distro built for a given desktop environment (like Kubuntu), though it’s still possible.
I’m enjoying Niri rn. It’s a scrolling & tiling window manager. I have it running on opensuse.
Linux is super configurable! You’ll just need to try out a bunch of different window managers, taskbars, etc to see which one you like best, but maybe look for some videos to preview a couple first.
The unixporn Lemmy community also has examples