Nice start! I recommend you invest in a couple of reflectors (white foam board is a cheap alternative), and bring a couple of friends along to be your lighting assistance. You can buy white foam board at most craft shops. Focus can be an issue. Try setting your camera up so you only use the center focus point. Then point that spot at your model, partially depress the shutter to lock the focus, continue to hold the shutter depressed and the reposition the camera to frame your image. As a rule of thumb, focus on the eyes. After you shoot the image, use the preview and enlarge the image on the LCD and examine the eyes. This will give you a quick assessment of the focus. The last image looks like her hands are in focus but the eyes are soft. This will happen if you let the camera make the focus decision. The 7D is a great camera but you still need to take control. You show so real talent here. Keep shooting!