Well, you might look into platforms such as Archive of Our Own (AO3), which is great for various types of stories. Or, if you prefer a more professional setup, try pitching to literary magazines' online editions. Some well-known ones include The New Yorker and The Atlantic. Just make sure to read their submission guidelines first!
Well, there are several options. Amazon Kindle Direct Publishing is a great choice if you aim for commercial success. Another option is Royal Road, which is known for fantasy and sci-fi novels. Also, consider posting on your own website or blog to have full control over the presentation.
Websites such as Archive of Our Own (AO3) are good options. They offer a free space for sharing your stories and have a wide user base. But make sure to follow their guidelines.
You can try posting on popular platforms like Wattpad or Webnovel. They have a large user base and offer good opportunities for your work to be discovered.