Board Thread:Questions and Answers/@comment-43565646-20190820124553/@comment-31135394-20190820135746

You can publish it on Wattpad and then announce it in HTTYD communities on social media, including our Discussion Boards. I know there are a lot of people who enjoy fan fiction, no matter where it's published, so you should be able to attract a number of readers. And Wattpad is pretty popular so a lot of people will be familiar with the site already.

Good luck!