Enrique Soro was a prominent Chilean composer whose piano works reflect a synthesis of late-Romantic European influences. This Berceuse is a graceful, refined piece that shows a high degree of melodic elegance.
Achieving an elegant, light touch in the right hand is necessary for the piece's charming character.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 Berceuse lasts about 3 minutes.
Berceuse 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 Andante favori by Ludwig van Beethoven, Black Beauty by Duke Ellington, 12 Variations on 'Ein Mädchen oder Weibchen' by Ludwig van Beethoven — see the full similar-pieces list on this page.