Don't take me wrong, but it certainly sounds that your mom needs some Linux in her life. Pick a stable distro, set things up once, leave them be. For basic stuff like web browsing Linux is stable, reliable and won't do any surprises for you.
In either case, it’s insane that it’s come to the point where Linux is recommended on the basis of UX for non-savvy people. I wish vendors has these options and support, but people who don’t have a savvy friend or family member will probably never even have a chance to consider it.