Need Help - Ohio Sealed Adoption

I'm new to this forum so I am trying to stay in the accepted terms of use. I was born in 1964 and adopted out in 1966 or 1967 and I want to find out who my biological siblings are. My adoption records are sealed (Ohio), and I do not have access to any information from them. I want to make it clear that I'm not trying to find my parents on this board. I am merely trying to find out how you can go about finding information when adoption records have been sealed? As many of you well know, it is very hard going through life not knowing where you came from. It took me 39 years to get to point where I am a brave enough grown woman to begin looking. I have contacted the children's services where I was kept, and have authorized them to make available any information to anyone trying to contact me through them. Are there any other resources that I can use? Please advise, thanks! Lost in Ohio