It starts from within. It starts by learning to love yourself as you are. It starts by learning that you have a sense of self worth that no one should be allowed to take away from you. It starts by understanding that you're no better nor any worse than any other person. Only then will you begin to build up any sort of self confidence.
Fake it till u make it
That is so true. No one is born confident, they just act it until it takes form. It's like learning anything.
the belief in yourself