Your lighting looks really great! I really like that there both an intense lighting and more subtle. I also like the color combo used, and how the background works well with the color of your fursona.
I noticed that your shading is textured, which I love! I think you could really use this to your advantage if you--instead of shading more circularly on the cheeks/elsewhere--shade in the direction of the fur so you can really get that fluffy effect.
You could give the lenses frames if you wanted to--or at least show something clamping the glass to the nose thing. Nothing wrong with frameless though I used to own a pair myself before I lost them.
You're doing great so keep it up!