I never recommend Manjaro, even for experienced users. Multiple times, they’ve let their ssl certificats expire, and renewing those has been easy to automate for a number of years at this point. There have been a number of cases where they ship work-in-progress versions of software as part of their default install, and there was an open letter posted calling this out: https://dont-ship.it
So in my opinion, Manjaro leaves much to be desired from a project governance standpoint.
Now, using an Arch-based distro that does the install process for you doesn’t absolve you from learning what it takes to maintain an Arch install; at some point, something will crop-up that requires manual intervention to get back up & running again after an update.
If that is what you’re looking for, I suggest EndeavourOS.
I second raptir’s note about running zypper dup in the terminal to do system updates. Zypper’s a bit slow because it lacks parallel downloads, but it provides good info if there are any issues.
If you plan to use flatpaks, add the flathub repo with the --user option, and use that one to install. If I didn’t go that route, it prompted me to enter my password for every flatpak app with an update. I’m also a deplorable Plasma user 😜, I don’t know if the same behavior happens with Gnome software, it may be a weird Discover thing (shrugs).
Also, if you need the non-free multimedia codecs, run the following commands:
zypper install opi
opi codecs
Automates adding the Packman repo & switching the relevant packages.
Those are the main quirks I learned with Tumbleweed.