I don’t know, but even though you sound reasonable about age and experience as primary factors or eligibility for writing about life, there are instances where very young people have spoken about and shared the highest wisdom related to life. You may take the example of Jesus Christ, Jagadguru Shri Adhi Shankara, Ramana Maharishi, Swami. Vivekananda, Swami. Rama Tirtha, etc., who were only in their teens and twenties. Wisdom has no limitations of age and experience. Wisdom of life is one’s gift by the almighty that is inborn too, not just gained by age and experience alone.