I dont really see any issue with the blowouts on the arm...reversely, there are alot of dark areas (probably due to your flash).
Her hair blends in with the back and arm of the couch. Light the area better and try and avoid your popup flash.
I agree with the issues with her expression.
The composition needs work as well. Try not to center your subject so much, look up the rule of thirds for help with composition.
On the plus side, you got her eyes sharp, but there is a lack of colour in them. Her body is pretty well light as well, but a picture should be light properly. If parts are dark or very bright, it should be by choice and add to the image instead of remove.
Keep practicing though!