Recorded my process for making a base head sculpt in zbrush from a sphere. The process should be part of a larger tutorial series I'm working on, so I can't share that yet. But, thought I'd share the mesh with the community incase anyone finds it helpful. Also, figured it would be nice to have a female base mesh as well, so I did a very quick sculpt of Daenery's Targaryen from GOT on a layer in zbrush. I didn't bother trying to spotlight match references or break A symmetry, so its really basic still. I hope I still captured some likeness, but I'm not totally sure honestly. Either way, I thought her face would work well as a generic female face as a starting point.
If you have any questions please let me know, thanks for looking! Oh, and besides being able to easily swap this mesh from a base male to female mesh, it also has uv's. :) Download the BaseMesh with Male/Female Morphtargets here:
This .ztl is compatible with zbrush 2022.0.7 and later.
If you want to know more about blocking in a head or practice yourself I have a bunch of content about this on my artstation here: https://www.artstation.com/artwork/dKLPGA