Recently moving from Fedora to a Mac to use my employer's computer one thing that's still very annoying to me after 6 months is the top menu bar that the Mac keeps fixed in the top of the monitor, even if I have the program window not occupying full screen.
I have a 4k 20 something inches monitor, so I keep around 4 different windows open. To go from a bottom right corner window to the top left corner File menu is a long trip.
Personally, I really like the top menu. It prevents apps from trying to style their own version of it, and it's always in the same place. Developers know that users always look there, so almost no apps skip making it. Was always the worst to me on Windows/Linux when programs would make their own crappy versions of a top menu that were all inconsistent and bad.
I use a mix of 27-inch 4k monitors and a 21:9 34" monitor, with many things open all over the screen, and have never felt it's too far away. You might try increasing your mouse speed a bit (you'll get used to it pretty quickly). If you can get from the bottom right to top left corner without picking up your mouse, you're probably at a good speed.
I have a 4k 20 something inches monitor, so I keep around 4 different windows open. To go from a bottom right corner window to the top left corner File menu is a long trip.