This is a lesser-known Italian vocal piece arranged for solo piano in a traditional salon style. It features a straightforward harmonic structure focused on lyrical expression.
Focus on consistent legato phrasing throughout the lyrical melody lines.
Comparable difficulty and character — good candidates for what to learn next.
'O suonno d''o cungedato is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 3.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
'O suonno d''o cungedato 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 'Who Knows?' by Ernest Roland Ball, Blues for Rodica by Serban Nichifor, Autumnal by Víctor Carbajo — see the full similar-pieces list on this page.