2. When you begin to draw people you are familiar with, it is usually easier to grasp this feeling, because you have naturally made these observations about him in your previous contact. Most people have their own special head and hand placement and their own specific sitting posture. They can't pose like this through your instructions, but if you let them relax, they will gradually form a natural posture and can keep it.
3. Choose a color tone for your portrait picture, but remember that it is usually best to make the background and clothes relatively mild, so that they will not conflict with the color of the face, so that the face will be in the focus of the picture. Try different light sources to ensure that the shadow projection method can show the structural characteristics of the subject's face to a certain extent. Generally speaking, it is best to avoid very dazzling light, because it will make objects look gaunt and old, and it will also make the dark parts lose color.