I like this idea, put all the Journey Threads (IG,FB,ETC) in one section, however I'm unsure about the private journey threads.
Maybe put them in the same section but only users with the correct rank can see them, they are totally invisible to other users.
Another suggestion if you do create this "Journey" section is to have a sticky thread, with a " Journey Thread Format "
Users would just copy and paste it and delete whatever is not relevant to them, it will keep all the threads neat and organised. However I don't think people should have to use the forums format, but if there thread is messy they should use it.
Edit: A case study section would be nice to or maybe do, Journeys & Case Studies