Autodidact

[Donald Trump]

A self-taught person that lives [an intellectual] life without help from [a teacher], or any form of education.
A person that spends most of their time researching, learning and discovering things on their own [behalf].

[Little_Girl]

a person who has learned a subject without the [benefit] of a teacher or [formal] education; a self-taught person.
a person who ownes an [autodidact] media key.