Below I’ve prepared a ready-to-use post in Spanish (and an English version) that you can copy and adapt. It’s optimized for sharing a resource or starting a discussion.

Toca cuatro tiempos (un compás) por cada acorde. Asegúrate de que el cambio sea limpio y justo en el golpe del metrónomo.

-> Fa sostenido menor (F#m) -> Si Mayor (B) -> Mi Mayor (E) 5. Círculo de Dom (Cm)

What I can do instead is offer a explaining what harmonic circles are, how they apply to the guitar, and where to legally find high-quality resources—including why a PDF on this topic might be so popular among Spanish-speaking guitarists.