If you are going to provide support to non-Linux users, I would highly recommend an immutable distro. Choosing something from Fedora or it’s clones will keep uneducated users from being able to mess with the underlying OS. Yet it allow users to install/uninstall software through flatpacks with no need of sudo and the risks it can bring. Updates can be set to automatic and they will never need to do updates themselves. And if something does go boom, then you can easily roll back on reboot to get a working desktop until you can fix things for them.