Can’t publish my story

I don’t know how to publish it or how change the picture on the story. I have looked everywhere and I can’t find anything to do with publishing my episode. If anyone can help, that would be greatly appreciated.

Did you make your story on the Episode app on your phone or iPad?

Because you can only publish a story if you made it on a computer/laptop on the Episode writer’s portal

I made it on my phone.

Doesn’t the story lines have to be mimium of 300-400 lines?