I’ve encouraged people that are taking on new or complex challenges as leaders to “be confident until they are.” Easy advice, hard to accomplish. It is only you that wrestles with and determines your initial level of self-confidence, at least the observable level.
How you initially portray your level of confidence for others ultimately affects their responsiveness and cooperation with the directions you set and the decisions that are made. From the success that your initial confidence fosters, you then will grow more confident internally as well. Might as well start with a higher level of internal confidence, at least until you convince yourself that you are more secure.
“Self-esteem is just the reputation that you have with yourself. You’ll always know.” — Naval Ravikant —