Type a nice message to everyone and then hit "Send Message". Congratulations, you have now introduced yourself to your new realm. Fairly soon, you will probably get some replies. For now, go do some real work. In order to log out of BattleMaster: click on "Family" (in the middle left), then click on "Logout" (same place). Check back in a couple hours and you will probably find some messages welcoming you to your new realm.