People don't really go to Fandom for news. And you can't compete with established news sites. You'd be wasting your time.
Exactly, this system of websites are meant for various things that people have interests in and are willing to support the wiki based around the content or topic. If you’re interested in that topic that’s okay, however it would mostly be you editing, with occasional other users.
Fandom wikis lean towards media topics as being more popular, such as games, tv shows, and movies. You mention that you like writing. Perhaps, you have a TV show that you like and want to write about a specific character, such as their personality and appearance. This is perfectly possible, and many wikis do this.
Many wikis could contain wrong information or spelling mistakes in such sections, which is when you can come in and fix them up! Not only will you continue to write and fix mistakes, you will also be practicing your writing that way anyway.
Sure, Fandom isn't the best site for news, but there are still many other things to write about. That's the magic of Fandom.