I have put up a couple of videos on my youtube channel to do with building a character head. They were done for someone I am helping to tutor, but I thought I’d make them available publicy in case anyone else found them useful.
Personally, I would advocate the Method02 video, but the other was added because that was the basis of the assistance request. I just think Method02 is less prone to getting “lost” during the process.
Method01: https://youtu.be/wbAU_tQM1aA
Method02: https://youtu.be/IOzn7S5iHiU