Honestly, just pick one that sounds interesting and install it as dual boot or on a secondary machine. I would recommend Pop OS for most people, but I ended up going from Kubuntu to Archcraft (also an interesting one to check out) to plain Arch with a fully custom setup. I have also tried Manjaro and Elementary OS, but never ran them as a full-time OS.

You will likely find good things and bad things about every one you try, and eventually find one you like. I prefer Arch mostly because of the AUR, but I have been really tempted to try Pop OS because of how much development has been going into it.

Regardless, don’t be afraid to search the Arch wiki for things, as it is a good reference even for other distros. Just know that you might have to use different package names than on the wiki.