Fear of content; Dead of Night scenario

One of my obstacles to play is my fear of creating content: what if I get it wrong? What if it's not good enough, there's not enough of it, it's the wrong sort? (It would be dreadful to have to practice that sort of thing. (I'm saying that with my tongue in my cheek; of course you have to practice!)) This only applies to GMing. Creating a character is usually easy. Since character creation and scenario creation are the same task under different headings, I know the fear is irrational. I don't feel this fear when I'm making content on the fly, because there I'm simply responding to prompts or gameplay demands in play, without time to worry. So "no prep" games, and games where prep is both communal and a part of play, like Monsterhearts and It Was a Mutual Decision, don't stress me out. Nor would My Life with Master. I'm stressed out by games like Sorcerer, Wuthering Heights, and Bushido, where I have to make a bunch of stuff in advance. D...