You have to decide at what level you want to play your game. Do you want to play in the Premier League or in Division IV?
If you want to play at the top level, then everything you do has to reflect that. How you and your team interact with clients, employees and other stakeholders has to reflect top-level attitude and outlook.
If you want to play at the top level but part of you believes you are not at that level, it will manifest in your behaviour. Your own demeanour has to align with that top-level standard. What you feel within you translates into your actions, reactions and overall behaviour. Self-confidence comes about when you have paid the price to be better and better every day. You have become a lifelong learner to fully appreciate the value of growth and wisdom.
Every day you have a choice of doing things as they come along or focusing on priorities.
Focusing on key priorities creates the best outcome. Your attention and energy are directed and channelled. Some people work on outputs instead of outcomes, but at the end of the day it is the outcome or the results that count, not the effort or output.