Weiss Kreuz Fans

I've been hearing things about this fandom for years, but I've never really been able to find information on it.

Where exactly do I start at in order to be introduced to this fandom? Where can I find this information? What sequential order do I read/watch/gather information on?

So far I'm completely lost at even where to start.

Help, please?

(mod note: if not relevant please delete)