Home Position of the mount, also known as Parking Position, is the initial state from were we begin to operate our mount.
https://www.myastroscience.com/homeposition
I have a celestron AVX and they are marked for me already.
True south, go to this YT link and will explain magnetic south,true south and basic setup of your eq mount.
https://www.youtube.com/watch?v=9SZ8Otnr3rs
regards
Kon