Rodatz's variations on this vocal melody are representative of the minor-master works found in early 19th-century pedagogical collections. They are characterized by traditional harmonic progressions and standard Classical variation techniques, making them an excellent study in structural clarity.
Ensure the independence of the fingers in the varied passages, particularly in the right hand against a simple bass line.
Comparable difficulty and character — good candidates for what to learn next.
12 Variations on 'Ich klage dir, o Echo hier!' is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
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 12 Variations on 'Ich klage dir, o Echo hier!' lasts about 5 minutes.
12 Variations on 'Ich klage dir, o Echo hier!' 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 The Entertainer by Scott Joplin, Bach-bwv-anh-114 by Johann Sebastian Bach, Bach-anh-114 by Johann Sebastian Bach — see the full similar-pieces list on this page.