As the title suggests, this piece is an intense exploration of emotional fervor within a modest structural framework. It is distinguished by its use of minor-key pathos and wide melodic leaps.
Mastering the control of crescendos and decrescendos is vital to conveying the emotional arc.
Comparable difficulty and character — good candidates for what to learn next.
'A passione is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
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 'A passione lasts about 4 minutes.
'A passione 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 surdato 'nnammurato by Enrico Cannio, Allegro in A major by Carl Philipp Emanuel Bach, Canto del esclavo by Nicolás Ruiz Espadero — see the full similar-pieces list on this page.