Autodidacticism
Autodidacticism is the property of being self-educated. This is to have learned one or more subjects without the guidance of a teacher, mentor, or institution. Generally, an autodidact chooses the subject and learns the material on their own by reading and study. Autodidacts may or may not have a formal education prior to their autodidactic studies.
Through the centuries many of these self-educated audodidacts have made notable contributions in the fields of art, science, music: Leonardo da Vinci, Charles Darwin, David Bowie, Steven Spielberg, Jimi Hendrix along with many others.