Hey there! I answered this via email right? Just making sure.
But yeah, for anyone else that reads this, I would just say start with the topics that interest you most. iOS wise, obviously the Swift basics are a great place to begin, but most of the courses assume no significant knowledge of Swift or Sprite Kit. So I think you’re safe to begin anywhere. Recent favs of mine though: The Pinball series and Learn tvOS (which makes a side scroller).