'HOME KEY' for mac??

In the on-line tutorials on You tube, the teacher says to press the HOME key when you need to move a door/window. I use a MAC and there is no HOME key!
I’ve been told to use the ‘fn’ key as its meant to be the equivalent, but that doesn’t work either!!

WTF, HELP

Hi,

The “Home” key on a Mac should be Fn + left arrow