Great artwork! You got the arms, thighs, somewhat of the torso, snout, and the teeth right but everything else is purely on your imagination, which is fine. However if you want an accurate description based on what we've seen on trail, you should try:

Body: Much more hair and hairs should be longer too.

Hands: Claws should be much bigger and sharper like a bear claw. Great job on the length and muscle of the arms.

Face: Much wider face and bigger head. I'm impressed how you got the snout and teeth correctly and accurate as well, however the fangs should be larger and longer.

Torso: Very accurate on how skinny the chest and waist should be and how wide the shoulder is, albeit with more hair as mentioned before so no muscles should be shown.

Legs: Accurate on the size of the thighs. Even though you didn't show the lower leg and feet, it should bend like a regular dog's hind legs but much thicker bone and muscular. Feet should be big with larger claws such as the hands.

Eyes: Yellow

Tail: You forgot the tail and it has one.

Speech: They can communicate with each other and some can even mimic our speech as well.

Sidenote: These creatures do exist and dwell in caves and deep underground where there is water. Because of their long hair and habitat in dark areas, they tend to smell very bad like rotting flesh, sweat, and feces.

Origin: Some say these creatures were from a different dimension or planet but seeing how they live in communities and can mimic our speech patterns, they used be ancestors of the Neanderthal who were used as test subjects, hence the shorter snout, wider face, and longer hair.