How do you find a proper guild nowadays without just blindly trying your luck with random ones and hoping for the best? I want to be a raider in WoD, but having not played the game with any real persistence since WotLK, I have no network. None of my friends play, I don't know anybody, and WoW's community and guild environment is an absolute mess these days. Instead of a server having a dozen guilds that most people know about, they have ten thousand guilds and not one of them are noteworthy (unless your server has a guild in the world top20 or something).
I'm completely willing to move servers as well, given the free level 90 boost you get with WoD. However, without having a target, I would have to resort to asking in general chat or looking at the realm forums, which isn't exactly something I'm optimistic about. I don't expect to leap into some kind of top raiding guild after years away from the scene, but I also don't want to waste my first month in WoD going from one hopelessly awful guild to another. How does one find a decent guild, and what are the signs to look for?