I am desperatelybtrying to find out whi I am since the death of my mother. My father was adopted and I have no contact with him but want to find my biological grandparents. Where do I BEGIN

First your adopted parents grandparents are your "grandparents" is there a problem with them.

But you contact your father ( why don't you have contact with him, you seem needing grandparents why are you not seeking the father)

Your FATHER could begin a search that has more options.

YOU, however, can register on reunion websites and hope, or you can hire a private investigator.