I believe the Home/main page is all of your notes*. Then you can choose to add links to hashtags as navigation - there’s a pop up when creating your site to turn on hashtags, then it gives you a list of hashtags it’s pulled from your notes (recent notes, not sure how far back but I know I’ve used some hashtags that didn’t show up). Check the hashtags you want and those become navigation links. 

Different themes have the nav in different areas. If you don’t select any hashtags, at least on the theme I chose, it picks 3, I’m guessing based on most used, but not sure about that. 

You don’t post anything to the website. In that regard, it’s like opening a Nostr client and seeing your feed. This just formats the notes your npub has made into a “website “. Also, looks like the website is just notes you create; not replies or comments you’ve made on others’ notes. 

* part of that pop up lets you also select “long form posts” in addition to “notes” but I have no idea what that means. 🤷