Preface section as i see is applied for whom who already get used to LISP.
If audience is whom who doesn't know anything about LISP, you've lost time to go around to find things you want.
Other languages have playground, or at least INSTALLING at the chapter 1. It should answer some IMPORTANT questions:
- How to install the compiler
- Which IDE best to use, or which extension.
- How to install packages, how to build it.