Started on the head, focusing on the eye/nose/mouth region as the rest of the head will morph into snakes...
Being a big fan, I'm using Giger's Li paintings as main reference:

https://www.fred-katrin.de/giger/othe...giger_li_I.jpg
https://www.fred-katrin.de/giger/othe...iger_li_II.jpg

- S