The minuets in K.585 represent Mozart's skillful handling of the Classical minuet form, offering polished melodic writing and well-defined harmonic movement. These pieces are characterized by their inherent grace and refined musicality.
Strive for a light, crisp articulation and an elegant shaping of the melodic contours.
12 Minuets (K.585) 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 Minuets (K.585) lasts about 15 minutes.
12 Minuets (K.585) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.