This obscure work is representative of minor Romantic compositions meant for domestic performance. It utilizes a typical lullaby rhythm to create a peaceful, song-like character.
Work on achieving a warm, singing tone in the upper register while the left hand provides a soft, rhythmic foundation.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse (Op.157b) 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 Berceuse (Op.157b) lasts about 3 minutes.
Berceuse (Op.157b) 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 Berceuse by Georges Bizet, Albumblatt für Frau Betty Schott by Wilhelm Richard Wagner, Berceuse sur le nom de Gabriel Fauré by Maurice Ravel — see the full similar-pieces list on this page.