You, just like everyone else that comes here asking for an account, regardless of which side you wish to join, need to post some credentials. Being active is hardly enough to warrant someone giving you an account, I don't think any tribe in W3 is that desperate for fresh blood. lol.
Oh, and there are no real openings for governing tribes. Unsurprisingly, both sides of the war that stands have long standing, well established and competent leaders. If governing a tribe is your desire, perhaps a newer world is better suited to your needs.
