I still think that the i3 way of managing windows is amazing, but I actually rarely needed lots of windows in the same workspace tiled.
I only have one extension installed from the package manager for the tray and that's it.
Manjaro + XFCE4 or Plasma Why? Arch based and let's you get into the ArchLinux world of doing things. AUR is a huge plus.
RockyLinux + XFCE4 or Plasma A rock solid distro that put's you to learn the same commands for the Red Hat world. Since most software works on Fedora, it will work here.
So my desktop is ArchLinux + XFCE4 but my favorite is Plasma. All my other RHEL or Rocky have no desktop environment, only terminal.
I don't like Ubuntu for so many reasons but many people use it. Instead of Ubuntu, I would prefer Debian.
Stay away from? Fedora, CentOS, and all other, unless you want to test those, but you can do it on a VM.
For example, Alpine is great but for some specific scenarios.
Also choose a systemd distro. If you want to test a systemd-less distro, do it on a vm.
Understands Windows-style keyboard navigation and shortcuts, which is way faster than reaching for a mouse and trying to aim at anything on screen.
For speed, learn _all_ the keyboard shortcuts. I mostly use my mouse only in web browsers: everything else is keyboard-driven.
I also rate Ubuntu's Unity for this. Looks like macOS but understands all the Windows keystrokes, even quite obscure ones.
For example the QuickLaunch bar, added in Win98 and deprecated from Vista on.
https://www.ancsite.com/bringing-back-windows-xp-style
Windows + 1...9 opens the n th item in the QL toolbar. Win+1 opens the first pinned app, Win+2 the second, Win+3 the third, etc. This works in Unity.
Stay away from tiling WM: most people don’t ever really need them. KDE and XFCE offer full keyboard shortcut customisation out of the box.
For me, choice of a distro boils down to picking a package manager, since everything else is basically the same.
I use it with Sway.
Everything was in a logical place, it used existing hardware well, and you could do almost anything with it.
It didn't have that weird thing where it would "snap" to the corners, or have strange mouse effects to try to dock things all the time. Clippy wasn't trying to sell my data, and was easily disabled, permanently. Remote Desktop made it possible to work remotely, even over a slower connection. All awesome stuff.