This is the original photo:
I cleaned the face and sharpened the details.
I did more cleaning and made the eyes brighter.
Straightened the face.
Here I adjusted the hair, adjusted the dark circles around the eyes, and made her look a little slimmer.
Adjusted the skin, wrinkles and overall light.
Sharpened the image a little more, adjusted the left ear shadows and adjusted the light around the eyes.
Before and after....