@4b11b4, this is why we have Requesting Help, because had you followed the advice there, we would have immediately let you know what was happening and what you need to do. Please review that post and keep it in mind for next time.
Here’s what you need to do: find or modify a theme to generate the content in the way you want. Your content is all markdown files, and they live in content. When you get a piece of content showing up at an expected URL, then you are ready to add the URL to the menu system.