Section 1.4 Where Next?
To start playing with PreTeXt right away, work through the Chapter 2. It will guide you through a cloud-based setup (no software install required) and you will create, edit, convert, and deploy your first document.
If you would like a general, high-level overview of features skip ahead to Chapter 3.
In-depth, comprehensive use of features is in Chapter 4.
If you have an existing project authored in LaTeX you may be interested in the conversion process described in Appendix I.