How do you do it ( hover )

Hovering's easy. First, you have to understand how the helicopter flies,
what the controls do in that process, what the helicopter you're flying is
doing at that instant, how to redirect the process with minimal control
changes-and be able to make the control adjustments while you evaluate your
situation and the changes just introduced. It's complex mentally and
physically until- it isn't- anymore.
Practice, practice, and more practice. You'll get through it.
Wally