I am sorry you have not gotten any helpful responses yet. Unfortunately, mine won't be much better. Although I am also in Oregon, my experience, both personal and professional, is with the foster/adopt path, not newborn adoption. Have you considered international adoption, foster/adoption, other ways to build a family? It sounded from your post that you were looking only at domestic, newborn adoption. In no way a bad choice, but I wonder if you have considered alternatives.
If I were you, I would start by contacting several different agencies, and see what they have to say. You could find them in the phone book, or a google search, or whatever. Each may have a slightly different focus; one may fit you better than the others. At this stage, I would not commit to anything, certainly not give anyone any money. Just ask lots of questions. I believe there are lawyers who specialize in adoption - they would know if you really must go through an agency, what the advantages are.
It sounds like your IVF experience is quite recent. You need some time to grieve. Using this time to do some research may give you time to sort out your own feelings, and learn about the options at the same time.
I know you are anxious to get on with this, to build your family. But remember, it is never a quick and easy process. And you have the rest of your life - six months or a year of planning and research will be long forgotten in the decades of love you share with a child.