possible suggestions right now, see what the doorand window would look like with a frame on it, something to make it seem like a door and a window instead of just a hole cut into the walls.

other then that, the only other thing is that it all looks offscale, somethings are huge (table, chairs, fridge) while the counter is really low and the cupboards seem to be up really high.

what does it look like with the character in the scene? might make the scaling seem better if it's compared to the character.