

What kind of contributing?
If you mean actually adding code or packaging or testing or anything along those lines, you’re probably looking for gnome. They hate normal linux stuff like middle click paste.
If you mean contributing by using linux, just pick something and start. You’ll have a lot to learn no matter what so there’s no point wasting time trying to figure out what you’re gonna want and working towards that.
If you mean putting other people on linux, don’t do that. It will make them unhappy and cause you lots of stress and work. Find a way to keep them on the systems they’re familiar with, either by using the well documented windows 10 iot ltsc or the accessibility options in macos. People deserve to choose weather or not they switch operating systems and when those decisions are made for them it needs to be done by those who will be working with them every day.
It would be helpful if your example of behaving identical to macos or windows were more clear, since macos and windows behave wildly different from each other. It’s like saying you need a normal european car that works just like your 2500 Silverado or civic si.
Debian/lxqt.