Well, it's not that hard to actually self-publish via Amazon, Lulu or IngramSpark for example, but getting your work distributed is another story. However, that's an issue with any platform as far as I'm aware of.

Now, for other options, the most obvious one is to start a blog, and you can do that with https://paper.wf for example! Which is a federated blogging solution.

Some mainstream options you have are:

• Wattpad
• Writers workshop (Local workshops are best)
• Royal Road (Mostly focused by LitRPG fans)
• If you are writing short stories or novellas, you can look for magazines that accept submissions in your genre, but I take that's what you are trying to avoid.
• If your work involves blogging/journalism or non-fiction in general, I'd recommend Substack and Medium as well, just beware that the monetization format can create an annoying culture.

And you can post here as well! :)