A quintessential Mexican Romantic salon miniature that evokes a reflective, evening atmosphere. Its melodic line is typical of the post-Chopin influence in Latin American piano music.
The primary challenge is balancing a singing melody over a flowing arpeggiated accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Amar... Nocturno para piano is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Amar... Nocturno para piano lasts about 4 minutes.
Amar... Nocturno para piano 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 "Amor" Vals de salón by Felipe Villanueva, Berceuse by Dora Pejačević, 'Believe Me If All Those Endearing Young Charms' by Clarence Lockhart Partee — see the full similar-pieces list on this page.