This piece is a characteristic Neapolitan folk-style composition known for its dark, brooding melodic character. It is distinct for its use of shifting minor modalities and expressive, vocal-style ornamentation.
Achieving an expressive, singing tone against the broken-chord left-hand accompaniment is essential.
Comparable difficulty and character — good candidates for what to learn next.
'O jettatore is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 'O jettatore lasts about 3 minutes.
'O jettatore is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include 'O malandrino by Vincenzo Valente, 'A testa 'aruta by Vincenzo Valente, 'E giesummine 'e Spagna by Vincenzo Valente — see the full similar-pieces list on this page.