Władysław Żeleński’s contribution to the Berceuse genre reflects the mid-to-late Polish Romantic style with refined chromaticism. It is a work that values atmospheric color over virtuosity.
Pay close attention to finger independence during the more intricate harmonic resolutions.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
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 Berceuse lasts about 4 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 Barkarola by Władysław Żeleński, Berceuse by Władysław Żeleński, As in a Rose Jar by Charles Wakefield Cadman — see the full similar-pieces list on this page.