Nice start. My tip? Start thinking a bit more about composition in your portrait shots. Your model is centered in the frame a lot of the time, which is generally a bad thing. Imagine a 3x3 grid overlaying the image. A good rule for composition is to place the subject on the intersection of any two of those lines - this is called the rule of thirds, and it's a great guide.
Also, the trend right now seems to be a tight zoom on the subject. Your photos have a lot of dead space around the woman - I think they'd be more impacting if you got a little closer. Good luck!