Mozart's variations on 'La bergère Célimène' demonstrate his ability to transform a simple melody into a series of delightful and varied musical miniatures. The pieces are characterized by their refined writing and inventive melodic embellishments.
Emphasize a singing tone and precise execution of the ornaments to capture the graceful character of the variations.
12 Variations on 'La bergère Célimène' 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 on 'La bergère Célimène' lasts about 12 minutes.
12 Variations on 'La bergère Célimène' is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.