I remember when I was about 20 my self esteem and confidence was a bit low, was shy, afraid of trying some things and sometimes even fail before start until a coworker explain me that nothing in this world is black magic meaning that everything has been done by a human with two eyes, two hands, same as any other human, so they can then I can, at least try and that I will fail probably the first or second time, will take me longer, wont be as good but at least I can do it too, after that and a few sucesful projects now I take whatever implementation in IT that someone ask me for, doesnt matter if I have never done it because I have that confidence in myself, from that point I became a different person