https://www.nytimes.com/2019/06/03/smarter-living/how-to-improve-self-confidence.html
The “Oxford Handbook of Positive Psychology” puts it another way: “If the person lacks confidence, again there will be no action. That’s why a lack of confidence is sometimes referred to as ‘crippling doubt.’ Doubt can impair effort before the action begins or while it is ongoing.”
If you believe you can get your dream job if you apply, there’s a chance, however small, you will.
How my heart sings 