Without derailing this thread, it is perfectly normal to want a baby and not a tween or teen when it's your first go at parenting. The most normal and understandable thing in the world......
Some of us have had dealings with the foster care system in our states and want no part of it. Not because of the kids, but because of what the system does to them and how it works. If the states in question would free up foster care children for adoption at a reasonable pace and not keep them in foster care for 10+ years before making them available for adoption, it would make all the difference in the world.
I encourage you or anyone else to adopt an older, waiting child. You should probably look into it. As for me, I wanted a baby less than one year old.