I have never played Pathfinder before or D&D. My friends and I started a trial run with various characters that they made and I have been directed into the GMing position. Yet I have no idea what I’m doing. I don't know how exactly to create NPCs or “enemies”.
My players are wanting an overall story arc (and I feel like they are expecting a lot from me, a beginner, because they have listened to The Adventure Zone podcast) and I don’t know what to do or how to create a story arc at all.
How to I learn to GM this game? How can I learn what I don’t even know I need to know?