I am under the impression that "Following Forums" just doesn't work.
I have a few forums that I have selected to follow. And there is new content posted to them regularly...and nothing is showing up in either my "My Content" sort or my "Content I Follow" sort. it is totally on me that I don't yet understand the difference between those two selections. But I have checked my Notification Options and it seems as if I should be gettting notifications on the forum whenever there is a new post/thread made in these forums. For example, one of them--RAH's "A Few Words About..." sub-forum--yields me nothing in either of those two sorts although it is one of the most active forums on the site.
Either I'm doing something wrong (the most likely event) or the forum software is not working correctly.
And as I said, I am still working on trying to figure out how the subscriptions--in general--is working out...but life is keeping me busy these past few weeks.