This is a late-Romantic character piece by the Austrian composer Eduard Lucerna. It is distinctive for its adherence to salon-style lyricism typical of the turn-of-the-century Germanic tradition.
The primary challenge is maintaining a long-breathed, singing melodic line over delicate harmonic accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Ballade op. 11 is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
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 op. 11 lasts about 4 minutes.
Ballade op. 11 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 Quejas, o la maja y el ruiseñor by Enrique Granados, Albumblatt in A minor by Johannes Brahms, Ballade by Leó Weiner — see the full similar-pieces list on this page.