This piece is a piano arrangement of a Neapolitan song by the famous composer of Funiculì, Funiculà. It is distinct for its characteristic Italian bel canto lyricism adapted for a flowing piano texture.
The primary challenge is maintaining a singing melodic line over a balanced accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
'Na bella nuvità 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 'Na bella nuvità lasts about 3.5 minutes.
'Na bella nuvità 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 marenariello by Salvatore Gambardella, 'E capille 'e Carmenella by Salvatore Gambardella, 'O primm'Ammore by Salvatore Gambardella — see the full similar-pieces list on this page.