We have adopted Hannah-Kate through Procare. They really are pleasant and supportive to work with! We had a great experience pre and post adoption with them!
They def do NOT discriminate against single moms.
However, they DO only have mixed/coloured/black babies, and the youngest you will get a baby is at 3 months of age.
If that suits u, then you cant go wrong contacting them. Also if you have any questions, just let me know!