I need some help with my charakter for the architect's room.
The thumbnail is already finished but I cant transfer it to the bigger version.
My problems are the proportions and the shading - the most important things

I do not know why I'm not getting further anymore, maybe a blockade, i dont know.
Any advice for me ?

So long,
Lorath
Edit:
btw, the proportions of the new head at the bottom right is almost what I want but cant
get more details on it -.-