If there is no reason for anything, then there is no reason to be for nothing, so you might as well be for something.
Maybe you don’t have the knowledge, but do you know where to find it? That’s the first step.
Does that fear you have really matter? Is your survival threatened if you act? Does the person you are scared of really have power over you?
Solve harder problems. The more difficult things faced and overcome the easier they look.