It often becomes apparent when talking to others with low self-esteem (SE) and low self-confidence (SC), that there is confusion about how to nurture, develop or heal this mysterious internal thing, substance, state, trait, or attitude (SE) and its external manifestation (SC).
There is no simple answer to this mystery for those who, as a child, have been significantly neglected, (not loved at all, or not enough), abused, (if one wanted to be generously callous about this cruelty, in opposition to neglect it would be called overstimulation), or loved too much (spoiled by being treated as royalty, often expressed in learning the cost of everything but the value of nothing.) Not to mention those with disabilities; another whole topic...