The Berceuse from the 'Dolly' Suite is a classic example of Fauré's refined, understated harmonic palette. Its grace and fluidity make it one of the most beloved pieces for piano duet or solo transcription.
The primary difficulty is achieving a perfectly balanced, fluid tone that does not succumb to rhythmic rigidity.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse from Dolly suite is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 8.
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 from Dolly suite lasts about 4 minutes.
Berceuse from Dolly suite 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 Gabriel Fauré, Ballade by Claude Debussy, Berceuse by Charles Lecocq — see the full similar-pieces list on this page.