Hello! Welcome to WoW!
It may help you to check out the WrA Information & Directories (Guilds | Communities | Events) thread. The listings don’t answer every factor you’ve mentioned here, but hopefully it’ll give you a starting point from which to contact people and ask for more info.
One caveat: I only see one guild currently listed in the thread that isn’t predominantly an RP guild, and you haven’t mentioned whether you’re planning to engage in RP. If not, this thread might not be as helpful for you, but just in case.
Good luck!