I wouldn't bother trying to learn Guile and would instead try to learn Lisp, or specifically Scheme, and then learn the few bits where Guile differs, because it's 99% Lisp/Scheme to me. (Scheme and Lisp have existed for decades and there should be absolutely plenty of resources to get up to speed in them.)

Knowing a Lisp in general is a significant advantage for a person who deals with writing code, IMHO. (I feel the same about regular expressions.)