This is one of Schubert's charming Fandango movements, full of his signature lyrical melodies and harmonic color. It balances moments of tender introspection with more passionate outbursts.
The challenge lies in shaping the lyrical phrases and navigating the sudden shifts in mood and dynamics.
Allegro in A minor (D.947) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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 Allegro in A minor (D.947) lasts about 5 minutes.
Allegro in A minor (D.947) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.