https://www.musical-u.com/learn/discovering-pentatonic-solfa-from-pentatonic-to-diatonic/
Do you want to really hear music, and play what you hear on your instrument?
The magic syllables of solfa (aka solfége, solfeggio) tell us not only what the notes are, but also how they relate to each other.
One way to gain confidence and skill with solfa is to practice with the five-note pentatonic scale.
Learn more here: https://www.musical-u.com/learn/discovering-pentatonic-solfa-from-pentatonic-to-diatonic/