The image of these two girls is in pretty bad shape — horrible contrast, bad color cast, soft focus, and in need of some healing.
If you need to rotate the image, choose Image→Rotate and select a rotation amount.
Crop the image using the Crop tool in the Tools panel.
To allow for maximum flexibility in editing, convert your background to a layer by double-clicking Background in the Layers panel; click OK in the New Layer dialog box.