Agree with @Brian "Panda" Choi, please share what references you used. Witness the references below: You can make out the planes of the face on the image below. Black Library's rendition: This cosplayer can be a great reference to use:
I couldn't find a detailed enough image for the expression so I used a quick look of myself in a mirror. Going forward I'll just take a photo or make a sketch. @ adrxzero - I have both of the top images but not the cosplayer so thank you for that real world reference. And here is a matcap of the head sculpt. Moving forward…