Young botanist studying rare flowers in ancient forest

As a portrait expert, I need your advice on creating a hyper-realistic portrait of a passionate botanist in his twenties; he is kneeling in an ancient forest, examining rare flowers with a magnifying glass and a tactical flashlight. His expression conveys studious fascination. Incorporate texture-rich details, such as dew-kissed ferns and moss-covered bark. Use cinematic backlighting, a close-up composition, and a shallow depth of field. Please advise me on how to achieve this level of realism.

don't grow a beard, don't grow a mustache