Using Linux for 30 years, I'm with MX and Xfce for years.

MX

None of them good for non techy people. I wouldn't recommend mint. Gnome is the most friendly DE with pleasing defaults. There are many immutable flatpak distros coming with gnome. e.g.: Endless os which is pre installed on some asus laptops instead of Ubuntu for reason.

because redhat smelly.

Also fedora is hella configured out of the box, which is nice for new users, and a good reason to just use it. But at that point i think you should just use something like debian while figuring out how to properly do the whole linux thing because it's going to positively benefit you quite a bit.

This.

i have a question, where is her second hand?

People who expect an effortless transition from Windows to Linux, are better off sticking to Windows. You are expected to be able to read stuff, and make some effort to understand it. It shouldn't be any less than what you'd expect if going from Linux to Windows.

Many things will be different. You'll get a long way with learning some fundamentals. If you make the effort, it'll be well rewarded. If it's not worth the effort, stick to windows.