Your skin is the largest organ in your body and generally the most under appreciated. Aside for cosmetic reasons, people don’t really take care of their skin. The health benefits to maintaining a healthy epidermis can help increase your overall health.
Make it a challenge to draw most or all of these. Use as inspiration to take photos of themselves with their phones. Draw onto tracing paper or acetate, try layering, continuous line, blind drawing, left hand etc to build portfolio