Brasileirinho is a famous choro by Waldir Azevedo, widely arranged for solo piano. It is musically distinctive for its rapid, virtuosic melodic runs and characteristic Brazilian syncopation.
Focus on consistent sixteenth-note articulation without rushing the syncopated phrasing.
Brasileirinho is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
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 Brasileirinho lasts about 3 minutes.
Brasileirinho is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.