A few words about lighting. Today, two lighting types for you:
Broad lighting—you are mainly lighting the half of the face that is largest to you )turned toward you).
Short lighting—you are mainly lighting the half of the face that is smallest to you (turned away from you).
There are many other types of lighting (Split, Rembrandt, Butterfly, Loop, etc), and they merge into each other rather than being cleanly split (e.g. you could make the case that the second picture is really more Rembrandt Lighting); but these two will do for now.
The effect: Broad Lighting makes a face look broader. Short (or narrow, as I like to think of it as) Lighting makes the face look narrower.