Anyone on earth is more organized than me! This fic is an exception because it's based on another story so I didn't have to come up with the plot, but in general my fics are a patchwork of little scenes and scraps of dialogue that I finally piece together and call a story. So usually I can't write them in order. Your "outlines" sound like mine! I know other people map out various "arcs" and "reveals" but my mind doesn't work that way for fic.