I work in tech, which has been traditionally dominated by men. I have always admired women (and men) who can walk into a room and command it without seeming overconfident. Some say I have a similar quality, but inside I am terrified. I typically get to a point in the presentation/meeting/discussion where this internal fear overtakes me and I hand over the "ball" to one of my male colleagues. How do I keep that fear tucked away or eliminate it completely?