No doubt you have a lot of questions. Write them down and take them along so you can get the answers. If at all possible, don't go alone. Not only can the other person (or people) provide moral support, but their calmer heads will be better able to absorb the information you'll be swimming in.
You'll have so much on your mind that you'll be easily distracted, so driving would be a bad idea.
Let us know how things go. I hope it helps to know that you're no totally alone in this.