I would say the first one is a good shot, I don't usually nitpick much on brightness, it's an overall dark picture, but she is wearing a dark outfit against a dark background. Overall a good first try IMHO.
Second one was the worse one. Too much sidelight, too little light directed at her face, not a balanced lighting setup. Also, the light reflected in the couch was a little distracting. But nice first attempts overall. Practice, best way to learn anything.