Hoffmeister's variations offer a concise example of the pedagogical and entertainment-focused music of the late 18th century. It prioritizes balanced phrasing and accessible harmonic progressions.
Students should prioritize the balance between the melodic line and the subordinate accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
12 Variations for Keyboard in C major is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
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 12 Variations for Keyboard in C major lasts about 4 minutes.
12 Variations for Keyboard in C major 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 Alla polacca by Franz Anton Hoffmeister, Andante by Wolfgang Amadeus Mozart, Bonne humeur by Cécile Chaminade — see the full similar-pieces list on this page.