ISO birth brother, born 5/9/1970 Boston, MA

Hi, I am Katie, 26, and live in Massachusetts. Forgive me if I don't use the correct terminology as I'm new to this. I am searching for my birth brother. We share the same parents. He was born on May 9, 1970 in Boston, Massachusetts and was adopted out at 3 or 4 days old to Catholic Charities of Boston. Both of our birth parents are ethnic Greeks. My father was 5'4" and my mother is 5'1". I've never tried looking before but I hope I can find him. Thank you.