Stylized Dinosaur Skull in Charcoal

your structure is accurate but needs more detail, the only critique i would say is to balance the rendering between soft and hard edges. theres n way to see where the indents are in the skull, and the imbalance between more blurry areas makes it harder to see what is being conveyed.

but its good, keep practicing!

I see where this is coming from, I grt the aim, Fine overall skill display and manipulation of lines. Just make sure the shadow and the teeth outline stays stand out.

The way you've captured the shape of the skull is really good, but could use some darker shading/a wider range of values on the outside (especially the jaw) to make it really stand out.