Basically, I'm going to tell you guys how to get inspired to write a story.
It's pretty easy, actually. You start of by looking for stories on the site. You didn't find what you were looking for? Then write it.
I mean, I was looking for a fanfic where someone from 5sos could read minds and I never found it, so I wrote a book with exactly what I was looking for.
Before starting a book, ask yourself these questions:
Would I read this?
Will this appeal to everyone?
Is this how I wanted my first draft to come out?
Am I happy with what I'm giving to my readers?
And once you're done with that, go write your book. If you happen to have writer's block, ask yourself this:
Would I want to waste this perfect story idea?
You'll surely get the motivation you need to write your chapter.
The main point of this chapter is: write what you want to read.
Hope this helped!