This is a short guide on how I learnt to be confident.

Number 1:) worrying. I saw an image/flowchart that basically went. Can you change it, yes -> change it, no,-> since you can't change it no point worrying about it. Number 2:) stop comparing yourself with others, sure that guy might be better looking than you, but see number 1), since you can't change it stop worrying about it Number 3:) confidence is not knowing you will succeed but rather even if you fail you will be fine Number 4:) the only thing worst than a [insert whatever-] is a [insert whatever] that is insecure about it.