The #mythgard community and #signum are definitely musts for fans of #tolkien or his circle of friends, the #inklings, as well as other medieval and speculative literature.

Mythgard includes free online seminars and discussions. There is also an annual conference, #mythmoot, in the DC/Baltimore area, as well as various smaller one-day conferences throughout North America and London.

Signum University is a masters degree granting online institution recently licensed by the state of New Hampshire that also offers auditing of their courses. There are courses taught by a range of scholars in things ranging from Old Norse to C.S. Lewis to Science Fiction.

Dr Olsen, aka "The Tolkien Professor" has a couple of long-running podcasts under his own name and Mythgard Academy.

See mythgard.org as a starting point.

Whew! That's much longer than I'd normally post! But you did ask, @freemo ;-)