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 used to use Joplin, I liked that it integrated with my Nextcloud, and the markdown format. However, the way that it handles the markdown files was too black-boxey to me, with the way it split them up in a weird scheme.
Now I use Ghostwriter with straight markdown files inside my Nextcloud folder. So I still get the syncing functionality, but a more flexible setup that doesn’t require a specific app to access all of my notes.