The hymn is perfect for a tenor. I sing along in two registers, the higher one a bit of a strain. Registers include modal (soprano, mezzosoprano, alto, contralto, countertenor, tenor, baritone, and bass), vocal fry (male, very low), falsetto (male, very high), and the whistle (female, extremely high).
I have revised my ideal Catholic K-12 school. Study English, French, German, Latin, and Greek. Add them to history, reading, writing, mathematics, science, art, music, and the Catholic catechism. Tall order. Please.