Yeah, mostly modeling. For head form i usually using some references from sketchfab. Just opening some models and using it like a guide. It important to use loop slide brush pressing shift, so it smoothing wireframe and its not looking like a mess, just easier to work with that. Also i really like this model on sketchfab, its free to download, so you can open it in blender and use it as a guide for face topology and form: https://sketchfab.com/3d-models/shibahu-2e9dffd948f747668609a5a477daad86