Job offer came in! - 8 months and counting

They called on Thursday with an offer and I said yes right away. It has been weighing on me all week. It is not my dream role, but the pay is fair and the people are kind. How do you handle the first week?

Thanks for writing this out. I went through something close to it 8 months ago, and it settled down once I kept a simple log of every call and form.