Try Cmd-w (close), Cmd-X (Cut), Cmd-C (Copy), Cmd-V (Paste), Cmd-Z (Undo), Cmd-A (Select All), Cmd-Q (Quit) with your left thumb on Command and the left index on the other key. Try Cmd-P (Print), Cmd-, (Preferences) with your left thumb and a right finger. I'm using macOS and Windows since the 80s, Gnome and KDE later; I still think that Windows and Linux are generations away from macOS consistency and ergonomic...