It is a good start, i've got a few comments though;
-the intensity of the desklight is to high, it also looks like as if it is a point light make this a spotlight.
- the fireplace should give some more light and the room should be a little bit darker to accentuate the light from the fireplace.
-it has an overall low-poly look try adding some details at the tablepaws for instance.
-give the glass on top of the table a blueish tint.
- use the texture that u used to color masonry of the fireplace as a bump aswell.
-don't texture the actual fire , model some firewood and add fire(dynamics).
-when you use spotlights in a scene like this turn on linear decay and turn up the intensity of the light.