Hey looking good! The wedge is indeed where the facial features will be placed and this I also refer to as the front plane of the face once it is built out with more features. I think you're doing the right amount of chest and shoulders for this exercise. The shape of the block in from the side view looks like it might be a bit off so I might take a reference image of the portrait from the side and overlay it onto the sculpture image to see the differences. Keep up the great work!