This is a quintessential salon-style Berceuse from the late Romantic period. It relies on a flowing accompaniment pattern to ground the lyrical, song-like top voice.
The technical difficulty lies in maintaining an even, non-percussive touch in the left hand while singing out the melody.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 Bouquet triste by René Esclavy, Berceuse by Joseph Lefébure, Bluebells by Beatrice Mary Hall — see the full similar-pieces list on this page.