As far as I know, shortcuts are already pretty much global. Keyboard navigation, copy/paste, open/close/save, it all pretty much follows the same Windows standards. It takes time to learn to use all the shortcuts though, and a lot of them aren't intuitive. I've had the same experience when I tried macOS, none of the shortcuts made sense and behaviour was often non-intuitive coming from a non-Apple platform.
If you're happy with macOS you should totally stick with macOS, but luckily there's people working hard on solving the most glaring issues with modern UIs. Once trackpad support improves, a lot of people might feel a lot better at home than they do right now.