By the looks of the placement of the nostrils, the head was at an almost 3/4 veiw, in which case you would see the head more like shown by my red-line. The blue is basically just showing a more defined back-of-skull shape, which is important when you are drawing horns, ears, etc. Head should e a bit bigger overall, and ... yep. Everything else covered by your other red-liner.
Hope it helps a bit!
.jpg)
.png)
.jpg)
.jpg)
.jpg)
.png)
.png)
