Georges Lamothe was a prolific composer of salon music, and this piece represents the light, pleasant character of the era. It is built on a standard rocking barcarolle rhythm common in 19th-century repertoire.
Balance the melody to sing clearly above the swaying rhythmic pulse.
Comparable difficulty and character — good candidates for what to learn next.
Barque jolie (Op.156) 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 Barque jolie (Op.156) lasts about 3 minutes.
Barque jolie (Op.156) 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 Brise des nuits by Georges Lamothe, Bella by Georges Lamothe, Billet doux by Georges Lamothe — see the full similar-pieces list on this page.