Samuil Maykapar was a prominent Russian pedagogue, and his Op. 18 Barcarolle is a staple of the intermediate repertoire. It is highly valued for its natural melodic phrasing and clear instructional goals.
Students must focus on the independence of the left hand to provide a smooth, rhythmic pulse beneath the melody.
Comparable difficulty and character — good candidates for what to learn next.
Barcarolle (Op.18) 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 Barcarolle (Op.18) lasts about 3 minutes.
Barcarolle (Op.18) 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 Gymnopédie No. 2 by Erik Satie, La fille aux cheveux de lin by Claude Debussy, Solace by Scott Joplin — see the full similar-pieces list on this page.