This is a character piece from the Brazilian parlor tradition, reflecting the salon music style of the late 19th century. Its distinctive charm lies in the light, rhythmic pulse characteristic of early urban Brazilian music.
Focus on the rhythmic clarity and consistent articulation of the bass line.
Comparable difficulty and character — good candidates for what to learn next.
103 Rua do Ouvidor 103 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 103 Rua do Ouvidor 103 lasts about 3 minutes.
103 Rua do Ouvidor 103 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Bach-bwv-anh-114 by Johann Sebastian Bach, Bach-anh-114 by Johann Sebastian Bach, Blumenwalzer by Léon Jessel — see the full similar-pieces list on this page.