A characteristic example of minor-composer keyboard variations from the Classical era. It relies on standard harmonic sequences and melodic decorations typical of the period.
Precision in the left-hand alberti-bass patterns is essential for maintaining the rhythmic pulse.
Comparable difficulty and character — good candidates for what to learn next.
12 Variations in G major is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
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 in G major lasts about 7 minutes.
12 Variations in G 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 Arabesque No. 1 by Claude Debussy, Bells across the Meadows (Characteristic Intermezzo)) by Albert William Ketèlbey, French Suite No. 5 in G major by Johann Sebastian Bach — see the full similar-pieces list on this page.