ok im not quite sure but what exactly is dimitri in the begining of the series? is he a dhampir like rose অথবা wut!?

He is a dhampir like Rose.

YES DIMITRI'S A DHAMPIR AT BEGINING OF THE SERIES!!!!

He is a dhampir like rose, except he has completed his training and is a guardian.

Yes, Dimitri was a Dhampir in the begining of the series. He is sworn to protect Lisa until Rose can pull her act together and become a great Guardian fit to protect Lisa.