Joachim Raff's 'Allegretto' is a delightful, song-like miniature, often found in collections of shorter Romantic piano works. Its appeal comes from its gracefully unfolding melody and sensitive harmonic language.
Cultivate a singing tone and practice seamless transitions between melodic phrases and accompanying figures.
Allegretto is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 4.
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 Allegretto lasts about 3 minutes.
Allegretto is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.