

EndeavourOS. The default desktop is KDE these days.
Easy to install.
Attractive desktops out of the box. KDE is the default. A few nice quality of life utilities.
It uses the Arch repos and kernel. The AUR (yay) is installed out-of-the-box. So, the biggest package selection in the Linux world. Always up-to-date. Updates fast.
Great community in the EOS forums. Some of the best Linux docs on the web in the Arch wiki. The Arch wiki is an amazing resource for learning.
Very stable. Breakages are rare, especially if you use an LTS kernel. The current LTS kernel is the same one that Debian 13 will release with “soon”. So, not exactly ancient.
Biggest “downside” is that there is no GUI software installer out-of-the-box.
If that is really a deal-breaker, just install one like pamac or octopi. “yay -S octopi” should do it.
Or install a menu driven text based package manager like pacseek. “yay -S pacseek”
Or just take a few minutes to learn how to use pacman or yay at the command-line. You said you wanted to learn.
I do not like being accused of attacking Manjaro but since you asked….
the project has had lots of governance and quality problems. Maybe those are all in the past. Maybe.
By design, Manjaro is not compatible with the Arch repos or the AUR. One of the biggest problems is that they hold their software back a few weeks. In theory this is for quality (not my experience). Regardless, many people have had problems, especially with the AUR. I am one. Others say they have not. Some even claim the rest of us have not either. Manajaro has “brought down” AUR itself (compared to a DDOS attack but really just quality again).
I used Manjaro for over 2 years and would never touch it again. And if what you want is an Arch based distro with an easy install, there is EOS. I have used EndeavousOS for I think maybe 5 years and I love it. Recently I have moved to Chimera Linux, which is not for everyone (it is awesome but I am not recommending it). It is not because of anything wrong with EOS.