Re: How do I set an article as homepage for my wiki?
On the Admin page got to Wiki (tiki-admin.php?page=wiki) and there is a field called "Home page" that allows you to specify what page you want your home page to be. I just tested on 9.6 and using an article title and it didn't work. I didn't put the url in there, just the article title. What I got was a home page with the Article title, but the contents of the article were replaced with the generic Home Page content you get when you first install Tiki: "Thank you for installing Tiki. The entire Tiki Community would like to thank you and help you get introduced to Tiki. etc"
One way I get article info on my home page is with the ARTICLES plugin. Not exactly what you're looking for, but might be able to accomplish the same thing.