Once you collect a good amount of scenes you can give them a cronological order which represents a grow or progress and they will start to make a plot. You just have to use a little bit of imagination to unite the scenes and VOILA! YOU HAVE A FINISHED FANFIC!
Had to make a meme to describe me currently
Me in the shower: *plans the paragraphs, dialogues and words i'll write for my WIP as soon as i'm done bathing*
Me as soon as i get out:
and of course the classic
my villain origin story is realizing how many words i have to write just to get to my favorite scene