This piece functions as a short, novelty-style character work. It is musically defined by its percussive rhythmic quality and simplistic melodic structure.
Keep the repeated notes clear and non-legato to maintain the playful character.
Comparable difficulty and character — good candidates for what to learn next.
Boom Ta-Ra! 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 Boom Ta-Ra! lasts about 2 minutes.
Boom Ta-Ra! 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 Blumenwalzer by Léon Jessel, Bluin' the Blues by Henry Ragas, Bohemia by Joseph Francis Lamb — see the full similar-pieces list on this page.