Note: If you have a tablet monitor on Windows, stylus pressure sensitivity won’t work in a “new window”… you need to do tablet drawing in the main Blender window. Apparently Linux and Mac don’t have this issue. Wasted some time trouble-shooting this.
Starting with sphere, stuck to constant detail for dyntopo. Draw, Grab, Snake Hook and Smooth did most of the work while Crease managed to give the illusion of detail on eyelids and mouth. The ears were a challenge and I kinda gave up on them half-way as more work seemed to make them worse.
Sculpted on tablet without reference so proportions will be out of wack. Looks a bit like a young Captain Picard.