The order of reading for the US model should be:

1. What are the US and MC Models and Why Use Them Over Commercial Models?
2. Do I need an ID?
3. About US User Datasets.
4. The US Model Workbook: read the Preface and then decide what else you need to read.

The order of the additional reading for the MC model should be:

1. Estimating How the Macroeconomy Works: at least skim this.
2. About MC User Datasets.
3. The MC Model Workbook : Preface and Chapter 1.

When you are ready to use the US or MC model, click in the left menu "Solve" under US Model or MC Model.