My first fanfic was one of those "written in a notebook in middle school" fics. I actually don't remember which one came first, but my friends and I had these little lives planned for ourselves, where each one of chose a favorite BSB and was married with kids to him. We wrote stories about that. LOL. I started writing the back story to that eventually. and later on, I starting re-writing that as "Forever," just to have something that tied all those little vignettes I wrote way back when all together. Subsequently, that became the first BSB fanfic I published online, oh, 14 years or so later. The first fanfic I actually published online was a Grey's Anatomy fic on fanfiction.net .