I am not sure exactly what you want to know, but I was a social worker for the state of Texas that did adoptions, I also have an African American little brother that my family adopted. Adoption varies a quite a bit by state, but if you have any specific questions, feel free to ask me! But here are some quick thoughts:
Know exactly what you want. As a former social worker, I can tell you, it's easy for them to try to pressure you into doing what they want. It's know because they are bad people, but after working many many cases, it was always easy to think that we know best.
Know if you want an open or closed adoption. Know how much contact exactly you are going to want with the child, and make sure that the family you pick is on board with that. I know you said that race was not an issue for you, and I totally agree that family made up of all different colors are beautiful (mine is Hispanic, White and Black), If you choose a Caucasian family just realize that race WILL be an issue for your baby someday, and make sure that you find a family with a healthy attitude towards race who can guide your baby to be strong and proud of who that are.