Bovy-Lysberg, a student of Chopin, heavily infused this work with the stylistic hallmarks of his teacher. It is distinct for its dramatic shifts between narrative, ballade-like sections and melancholic waltz episodes.
The technical demand lies in transitioning smoothly between the dramatic ballade sections and the flexible, rubato-laden waltz themes.
Comparable difficulty and character — good candidates for what to learn next.
Ballade et valse d'Ophélie 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 Ballade et valse d'Ophélie lasts about 6 minutes.
Ballade et valse d'Ophélie 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 Charles Samuel Bovy-Lysberg, Canto alla mazurka by Charles Samuel Bovy-Lysberg, Barcarolle by Xaver Scharwenka — see the full similar-pieces list on this page.