This work belongs to the genre of light concert music meant to bring popular stage music into the living room. It focuses on maintaining the charm of the original through a consistent waltz meter.
Master the left-hand waltz-rhythm to provide a secure foundation for the right-hand melody.
Comparable difficulty and character — good candidates for what to learn next.
Bouquet de mélodies sur 'Les cent vierges' 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 Bouquet de mélodies sur 'Les cent vierges' lasts about 4 minutes.
Bouquet de mélodies sur 'Les cent vierges' 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 de mélodies sur 'Requiem' de Verdi by Cramer - Pseudonym, Bouquet de mélodies sur 'Les contes de Perrault' by Cramer - Pseudonym, Bouquet de mélodies sur 'Saint-Mégrin' by Cramer - Pseudonym — see the full similar-pieces list on this page.