First of all, I do really hope you don't believe in the Bram Stoker kind of vampires? The ones with fangs and such? Because in that case, I truly recommend you to just stop being an angry adolescent and go do some serious studying.
If you mean an vampire elder in the way of becoming a master at draining other people's life force through magic, then ignore the first things I said.
Becoming a high satanic priest is ''simple''. Advance greatly spiritually, show remarkable talent, commune with Father Lucifer, do his bidding, dedicate not only your soul but your entire life to his will.
To become a ''Vampiric Elder'' I recommend studying about psychic vampirism, necromantic vampirism, auric vampirism and so on and practise it on anyone you don't like.
I myself am draining my father's life force on a daily basis. Not so much for the life force itself, but rather to hurt him and to teach myself how to do it.
Good luck, I do hope you're serious in this. I hate angry adolescent ''satanists''...
Ave Satanas!