This Brahms piece is a brief, wistful character piece characteristic of his late-Romantic output. Its simplicity hides a complex harmonic landscape typical of the composer's style.
Achieving the correct balance between the inner voices and the melodic line requires careful finger-independence.
Comparable difficulty and character — good candidates for what to learn next.
Albumblatt in A minor is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Albumblatt in A minor lasts about 2 minutes.
Albumblatt in A minor 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 Albumblatt für Clara Schumann by Johannes Brahms, Albumblatt by Johannes Brahms, Balada by Antonio Jimenez Manjón — see the full similar-pieces list on this page.