This is an early, charming Allegro by Mozart, likely from his student years. It is characterized by its bright, cheerful melody and clear classical structure.
Focus on clean articulation and evenness in scalar passages.
Allegro in B-flat major (K.Anh.96) is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 3.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 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 B-flat major (K.Anh.96) lasts about 3 minutes.
Allegro in B-flat major (K.Anh.96) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.