Thanks. It's interesting. That red symbol in the bottom right is what I'm looking for, but I don't see it on pages in my browser. Neither on this page, nor on https://forum.urbanohio.com/topic/211-columbus-osu-university-area-developments-and-news. At the bottom right I see links for "Unread Content" and "Mark site read", but nothing to the right of those.
Following the instructions in the link in your second posting above, I go to "Home > Activity > Content I Follow" and then I see the rss option under "Stream Options". That gives me an rss feed for all content I follow. Since I'm only following one forum right now, that gives me what I want. If I were to start following multiple forums and wanted an individual rss feed for each, I'm not sure how I would do that.