Firstly I choose 'basic head' to model the head
Usually I use all object turn into level 4 after you make the basic shape(level 0/1).
Basically I also use object sphere to make something.
Like the teeth, mouth and something else.
The mask is level 4 firstly
Turn out got a little problem for the detail.
I level it up to level 7(and its make ur laptop not responding for awhile coz the heavyness of ur file)
Then color it.
Click this to see the video
