You can't be afraid to put out a fire if you're a fireman. You can't be afraid to be a police officer and carry a gun if you're afraid to get up and go out there. So you've got to put that fear to the side and go out in faith to overcome that.
While teaching I also worked undercover in the lower courts by saying I was a young law teacher wanting experience in criminal law. The judges were happy to assist me but what I learned was how corrupt the lower courts were. Judges were accepting money right in the courtroom.