Yes.
Yes, that looks about right. You're doing the right thing, looking at the shadows and the light and deciding where the sources must be and how soft are they. Notice that the key on the close-up is a little higher than drawn to produce that nose shadow.
Notice in the medium shot the actors' eyes are a little dark and there is no sparkle of reflected light. A small eye light near the camera would help.
Yes, that looks about right. You're doing the right thing, looking at the shadows and the light and deciding where the sources must be and how soft are they. Notice that the key on the close-up is a little higher than drawn to produce that nose shadow.
Notice in the medium shot the actors' eyes are a little dark and there is no sparkle of reflected light. A small eye light near the camera would help.