You can post your original stories on various online writing platforms like Wattpad or Medium. They have a large user base and are popular for sharing creative works.
Websites like FictionPress or Archive of Our Own (AO3) could be great. FictionPress is specifically for fiction, and AO3 has a wide range of fanfiction and original works. Both have active user bases and supportive communities.
Websites like Archive of Our Own (AO3) are good. They offer various categories and a supportive community for original works. However, you need to follow their posting guidelines carefully.
Your own personal blog is a wonderful place as well. You have complete control over how you present your stories. You can customize the look and feel of your blog to match the mood of your stories. And, you can build your own brand and following over time without having to abide by the rules of other platforms.
One great site to post original stories is Wattpad. It has a large community of readers and writers. Many genres are welcomed there, from romance to science - fiction. It also offers various tools for writers to interact with their readers.
Some other places could be specialized fiction forums or communities related to your genre. For example, if it's fantasy, you might look into specific fantasy writing forums. These often have engaged readers who are passionate about that particular genre and can provide valuable feedback.
Reddit has various writing - related subreddits like r/WritingPrompts and r/ShortStories. You can post your original short stories there. The community is quite active, and you'll get instant feedback in the form of comments. However, be aware of the subreddit rules to ensure your post is well - received.