If you have the authority to assign yourself privileges, then you will almost always HAVE those privileges. The only situation under which you wouldn't, would be if you were set as 2IC of a faction without having had the privilege set before that.
IF that ever happens, and you still can't figure it out, then come back and ask.
If you don't understand how to get privs, or where they come from, then you certainly can't give them to yourself.
"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."