Gabriel Pierné's Berceuse is a delicate salon piece typical of the French late-Romantic style. It features a graceful, swinging rhythm and a highly melodic, decorative right-hand line.
Focus on the legato connection of the melody and controlling the dynamic shading within a narrow range.
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 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 Barcarolle by Gabriel Pierné, Bouton d'or by Gabriel Pierné, Bright Eyes by Florence Price — see the full similar-pieces list on this page.