Right now the best I can offer is is the Warcraft Wiki. I do hope to get a new Tauren Rp Guide written and posted.
warcraft ( . ) wiki ( . ) gg/wiki/Warcraft_Wiki
There are also a list of guides here on the forums. Check out the links under Tauren.
Feel free to post any Tauren Rp/lore questions here in the meantime. I don’t mind helping and it bumps the thread too. And that goes for everyone!