Imagine my surprise when I realised that I have to re-learn a ton of shortcuts I used constantly in Windows and Linux. Why? Because in macOS going to the start of the line in a text editor is not as simple as pressing the [Home] button...
Hungarian macOS keyboard guide to newbies
Switching to Mac from Windows should have been a joy - and if I used the standard US keyboard layout it probably would have been less of a nightmare. In that case I only would have had to re-learn about 20 shortcuts to be effective again.