This Barcarolle by Mel Bonis is a charming example of her late Romantic style featuring fluid harmonic textures. It captures the quintessential rowing motion typical of the genre with a refined French elegance.
Focus on maintaining a seamless cantabile melody over the gentle, rolling 6/8 accompaniment patterns.
Comparable difficulty and character — good candidates for what to learn next.
Barcarolle (Op.134) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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 Barcarolle (Op.134) lasts about 4 minutes.
Barcarolle (Op.134) 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 Mel Bonis, Black Pearl by Mel Bonis, Boston-valse by Mel Bonis — see the full similar-pieces list on this page.