First build: opinions/advice/suggestions?

hi! i'm trying to make a hyena and this is my head so far:






i know the jaw looks really awkward because i put it lower then i needed too, and i put some weird piece of foam between the bottom of the cheek and beginning to the jaw. i made it to fit my head a bit more loose because i wear glasses. i still have some things to add like some bulk/detail for the ears. the jaw is static and those eyes are just place holders.

if you have any suggestions or see anything i can improve on, let me know please! i want to make this as best as i can. this head has been a lot of trial and error so far, so advice would be great too.

this build is going to be a partial based on my character, Thuq-