What can I improve from this picture?

Camera: nikon d90

The image above was my first photo shoot by myself. And i move the settings around, which it listed below for my clothing website. I'm fresh with photography, please tell me what should I improve in the camera settings and lights. Thanks.

-shutter:30
-aperture: f8
-exposure compensation: ±0
r13 (i don't know what is this)

The models pretty, it shows the clothing well, she's exposed well but the only thing
I find with the photo that needs correcting is that the photo feels a little flat. I do tend to like photos
with a little more expression… But can understand its hard when your trying to show the clothes in a good way. Experiment a little more with the models posture and facial expressions.