This early Mozart Andante, found in his keyboard sonatas, is a delicate and charming piece. It showcases Mozart's early mastery of melodic invention and balanced Classical phrasing.
Developing clear articulation and a precise, yet gentle, touch is essential for this early Classical work.
Andante in E-flat major (K.15mm) 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 Andante in E-flat major (K.15mm) lasts about 1.5 minutes.
Andante in E-flat major (K.15mm) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.