Tell me you don't know much about Guile without telling me you don't know much about Guile. The whole vision of Guile from the get-go was to give it the ability

Tell me you don't know much about Guile without telling me you don't know much about Guile. The whole vision of Guile from the get-go was to give it the ability to transpile languages programmers liked, such as Perl or Python, into Scheme and thus become a universal extension runtime for GNU software. That dream got closer to reality with Guile 2.0 and its multi-language "compiler tower" which already supports ECMAScript and a subset of Emacs Lisp. But Scheme is Guile's native tongue, so you don't have to learn how to use those in order to be a "fully competent Guile developer", and you wouldn't have to learn Wisp either.