You should learn basic camera shots, angles, and moves. Know what a medium shot is. Know what a reverse-angle shot is. Know what a dolly shot is. Know what a two and three shot are. Pick up ‘Film directing Shot By Shot’ by Steven D. Katz’. It can provide the technical foundation you will need as a director to help your creative vision come to life. Keep in mind their is only so much you can learn from books. When you get on set you’ll hear terms for shots, like ‘cowboy guns’ and ‘cowboy no guns’ not covered in a book. It’s a medium shot from the waist up no guns to thigh up guns. People will yell ‘Wolf!’ which means stop. “Flying in (insert film gear here) means bringing in. No shame in asking what a term means when you do not know. Ignorance is not bliss on a urban film set.
I was a grunt production assistant (PA) acting as a human stop signing