Select the beard shape and the face shape and Combine Shapes--Add Shapes as shown. Draw a small ellipse for the eye, make a duplicate and place it slightly below as shown. Bring the lower ellipse to the front (Ctrl-F). Select both ellipses and Combine Shapes--Subtract Shapes. This should produce a crescent shape as seen on the right.
Make three small circles for the nose to the sizes shown on the left side. Select all three circles and Add Shapes, make a duplicate and position the duplicate on top and slightly higher. Select both objects and Subtract Shapes to produce a shadow shape that will define the nose.