If I understand correctly, you want a self hosted version of Wattpad or Inkitt for posting stories. I don’t know if there is a 1:1 software that can do exactly that.

As a starting point, you could try building a static website. They easiest ones follow a blog format and store the text on a markdown file. Many have recommended Hugo on this thread, but I’d like to recommend Zola instead. Paired with the well documented tabi theme, you could spawn a new “blog” for each story and use the archive view to have the chapter selection.

It’s not exactly the best solution, but I think it’s a good starting point to try it out.

P.S. Zola is inspired in Hugo. The creator thought Hugo was too complicated.

This script triggers changes by reading ratio and seed numbers, but I think its main goal is to never stop seeding rather than reading paused torrents. https://github.com/tomodoro/qbitseedmgr