If you're having trouble with line weight / quality, I would recommend that you practice drawing straight lines, circles, and curves using your arm and not your wrist.
If you use your arm as opposed to your wrist, you'll find that your lines will be more flow-y and crisp. It's difficult to do at first, but it's well worth it in the end.
What you're doing now is awesome and I hope you achieve what you're looking for in art. c:
Thanks I will remember that!
Another quick sketch; I included the base work with this one hoping it could help isolate my mistakes.
Sorry about the lighting, I just had to work with it.
Both pictures are light as I don't have a scanner and had to use a camera phone.
I didn't warm up properly and unfortunately it shows. I really fudged up the nose this time around.
The two primary areas i'm concerned with are the ears, which seem completely wrong, and the muzzle (more specifically it's size in comparison to the rest of the head.) I really loved drawing this picture, but I can't shake the feeling that i'm doing something fundamentally wrong. Please be brutally honest.
I'd like to finish up perfecting the head and then move on to doing full body once my confidence is up.