Hi there!
Is there something particular you'd like to learn about or just in general? The first advice I'd give you is this: Skip the documentaries, skip the movies and skip the podcasts. Books is where the real knowledge can be found and we've got an excellent book list which should cover some areas that might be of interest.
There is a pretty good, simple documentary I watched a while ago, even though it was missing some facts and all, but it's fun to watch nonetheless.