This aria is a delightful example of keyboard writing from the early Baroque, featuring a gracefully flowing melody. Its musical distinctiveness is found in its tender lyricism and the refined ornamentation that embellishes its simple beauty.
Cultivating a smooth, singing tone and nuanced ornamentation is key to its expressive delivery.
Aria della Signora Fior d'Amor is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 5.
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 Aria della Signora Fior d'Amor lasts about 3 minutes.
Aria della Signora Fior d'Amor is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.