Create a gouache artwork on canvas depicting a 15-year-old Bolivian boy with caramel skin and tightly curled black hair. The focus should be a close-up of his face from a frontal view. Use the depth and vividness of gouache colors to capture the texture of his hair and the smoothness of his caramel skin, highlighting the nuances and contrasts of light and shadow. The piece should convey a sense of youth and inner strength, with precise brushstrokes that emphasize the expression of his face and the intensity of his features.