The word "autodidact" is used for an entirely self-taught learned person.
A measure of self confident is how well a person expresses himself/herself in public. You can assess self confident in how a person handles issues.
This person female would be conceited or .... vain, egotistical, self-important, self-satisfied.
A Narcissist
You could call this person a "selfish immortal."
You can call a person who knows what they want assertive, decisive, or self-assured.
The person that suffered of mental disorder and hurts himself is called "self-injurer"
self conscious,
An autodidact person is a self-taught person; an autodidact person is a person who taught himself or herself a subject without any formal education or help from a teacher.
A person with low self-esteem is often referred to as having poor self-image or low self-worth. They may have feelings of inadequacy or lack of confidence in themselves.
an auto-author, or the author of an autobiography.
I say a person's thoughts and feelings about himself or herself