Outline face/body and change rest of picture to black background

I'm just learning my way around in Adobe Illustrator 10.0.  I couldn't find Adobe Illustrator in EE, but possibly someone can help me here.  

Okay, I have a picture that I need to modify.   It basically is a portrait image... unfortunately, this picture was taken in a restaurant, so there are "disturbing things" in the background.

My question:   How can I outline the face and part of the upper body contures and then change the rest of the picture to e.g. a black background?   Please provide the actual steps (menu choices) and features that would allow me to manipulate the picture.

Thank you,
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