Confidence: firm trust, a sense of self, appreciation someone's proven track record
If you look up the word in the dictionary, that is not what you find.
All dictionaries are now in step with the tendency to make words vague, not matching the reality... this word is a crucial word in your vocabulary. Unless you get this right, your chances of having a self, and thus the chance for self-confidence are between zero and none.
No one takes my Starting Point Measurements Seriously. How do I know? Because I have literally haven't had anyone ask clarifying questions about certain key words that will make or break you... Not even one.