The problem there is the same as that of idealised communism, you're relying on humans to do what they typically don't do. Humans will take for themselves at the cost of communities if they feel they can get away with it, including the ones in government.
Because software development in a corporate environment relies on milestones, deadlines and guarantees. Open source, which relies on volunteer work, doesn't do this well.
Side dock, top panel, lack of a “start” menu are already three immediately visible differences, and you claim it’s not that different?
The side dock is a taskbar except on the left hand side. Big whoop. Top panel is basically the system tray as seen on Windows, with all functionality fairly obvious just by looking at it, and there is infact a start button where you can type in the program name you're looking for, just like most people do in Windows. Not exactly MacOS levels of relearning.
Which is EXACTLY why I mentioned them, so that they can Google it.
Or...you can explain what you are talking about. Like I did for you. Sending newbies off on wild Google chases is not helpful.
The default UX used in Ubuntu may actually be confusing for newbies, as it’s quite different compared to Windows.
It's not that different, dude, and it's not like they don't give you a tutorial on first boot either.
Perhaps a distro which uses KDE, XFCE, Cinnamon, MATE or LXQt by default.
Gauge your audience dude. A Linux newbie will not know wtf anything you just named is. (For any other newbies reading, these are all 'desktop environments' - essentially collections of programs that make up a user interface)
First time? Use Ubuntu. Not only is it easy to use and a good UX overall, most tutorials assume a Ubuntu based distro (there are differences between distros that can be...hard to translate over). That's going to be really useful when you're looking up how to do stuff