This aria for voice and orchestra by Mozart, often performed in piano arrangement, is a charming example of his classical lyricism. It is characterized by its flowing melody, delicate ornamentation, and graceful accompaniment.
Focus on achieving a legato, singing tone and delicate articulation in the accompanying figures.
A questo seno deh vieni (K.374) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 A questo seno deh vieni (K.374) lasts about 2.5 minutes.
A questo seno deh vieni (K.374) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.