Zorin is a solid distro and is designed to appeal to Windows users.
Buuuut knowing what I know now I worry Zorin's simplicity could turn people off of Linux. Zorin is a good OS for your grandmother but the average person who would consider installing Linux wants to be able to tinker. Heck, I would consider the very act of changing your operating to be tinkering. Nobody accidentally stumbles installing Linux.
The options with Zorin are either use it as-is or risk breaking it. That's why I would personally recommend a KDE distro, probably something immutable like Fedora Kinoite. That way you can tinker to your heart's content with no fear of breaking it.