There seem to be two threads of chatter surrounding RSS, 1) getting Flarum to read RSS feeds and convert those into forum posts, and 2) getting Flarum to be an RSS feed and tell people when new forum posts are made which is what I think you want. This looks promising...
https://discuss.flarum.org/d/27687-syndication-rss-atom-feeds
I've never used RSS, but from a quick glance, this would allow you to configure your RSS reader to hit the Mobius forum site using URLs like mobiuslooper.com/forum/public/rss/discussions. Does that fit with what you were thinking?
What I think is going to be hard is notifications I've seen in other systems, where if you are the author of a post, you will automatically receive notifications when anyone replies to that post. I think this RSS feed would give you everything, whether or not you had any involvement in the original post or one of the replies. Still it might be useful as a quick "has anything happened?" since this forum doesn't have a lot of activity.