Male, born Oct 4th 1970 in PA

Hello, This is my first try at something like this, so I thought the forum might be a good place to start. I was born on Oct 4th 1970 in Pennsylvania and adopted in Allegheny County, PA through a Catholic adoption service. As far as I know, I was a new born baby given up for adoption by a young mother who I believe may have been in her teens at the time and could not keep or raise me. I have more info such as hospital name, doctors names etc that I wont post here on the forum just yet. I am searching for my birth mother, and also have the hope that maybe I have siblings I do not know of, due to her being so young, I would imagine she may have had more kids later in life. I am not sure where to begin, so any advice is appreciated. Has anyone had any luck with Search Squad group on facebook? Thanks in advance for any help. William