Job offer came in! - 13 months and counting

After 13 months I accepted a job as a copywriter. I would rather hear the honest version than the polite one. 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 13 months ago, and it got easier once I kept a simple log of every call and form.