Johann Baptist Cramer's Op. 12 sonatas are characteristic examples of the Classical style, emphasizing clarity, balance, and melodic grace. These works are often used pedagogically to develop foundational piano technique.
Focus on clear articulation and evenness in the Alberti bass patterns.
3 Piano Sonatas (Op.12) 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 3 Piano Sonatas (Op.12) lasts about 8 minutes.
3 Piano Sonatas (Op.12) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.