Self confidence is something that comes and goes. It growns with time and sometimes it takes a lot of time. And you know what the worse about it is ? That it sometimes just takes one person to break all your hard work.
A tip from me, a simple girl that made her way to the position to say that I am self-confident would be to enjoy every single mistake and single situation of struggle that you incounter. It will make you stronger. And the more you learn how to behave in these situation and the more you are able to take the positive out of it, the more you will grow.
And to grow is the whole point of it. To be grown is not only a number...it's a state of mind that can sometimes even impress you with time.
Keep dancing