Well, everything is working, but need to figure a few things out. I used [[iA Writer]] to post to the site and it works! I've made Article post types into what I call Notes here, the main post type.

Posting from [[Quill]] as an Article isn't going to work¹, since it turns everything into HTML and escapes the square brackets in [[wikilinks]].

For the (Micropub) Notes post type, I've created a new kind called [[Logs]]. They use the current date stamp as their filename, and I made a temporary logs page to display them.

So, I can post arbitarily long Notes posts with Markdown formatting and wikilinks. This could replace my manual Journal entries. Instead, I would auto-generate journal pages per day (not sure if this is possible), or maybe just show the last N days of logs on a main journal page.²