Learning charcoal portrait technique involves understanding how to use charcoal's unique properties to create lights, shadows, and textures, while also mastering techniques such as blending, smudging, and erasing to achieve desired effects. It is important to practice regularly, experiment with different tools and surfaces, and study the work of experienced artists to develop and refine your skills in charcoal portrait drawing. Dedication, patience, and a willingness to learn from both successes and mistakes are key in mastering this technique.