I'm one of the developers. Happy to answer questions.
We picked the name Shill because it sounds a lot like shell, but is a bit of an in-joke because it is built on Racket, which is a descendant of Scheme. All three have slightly negative connotations: schemers, racketeers, shills.
I'm really interested in using Shill but all of the instructions I've found in the past is either the whitepaper or man-page style documentation. It seems to be missing the human-friendly first time guide as you find on most modern language sites like Go/Rust/Ruby. For ex: https://golang.org/doc/code.html