This piece is a standard representative of the period's light, celebratory piano music. Its musical interest is found in the polite interaction between the simple bass figures and the dance-like upper voice.
Maintain consistent tempo throughout the piece to ensure the waltz character remains intact.
Comparable difficulty and character — good candidates for what to learn next.
Boas festas is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 2.
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 Boas festas lasts about 3 minutes.
Boas festas 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 18 German Dances and Ecossaises by Franz Schubert, 18 German Dances and Esoccaises by Franz Schubert, 18 German Dances and Esoccaises, by Franz Schubert — see the full similar-pieces list on this page.