Can you show me how to draw a detailed head and shoulders portrait?

To draw a detailed head and shoulders portrait, start by sketching the basic shapes of the head and shoulders. Add in the facial features like eyes, nose, and mouth, paying attention to proportions and details. Then, work on shading and adding depth to create a realistic look. Use different pencil grades for shading and blending techniques for a more polished finish. Practice regularly to improve your skills in portrait drawing.