This piece by Johann Strauss Sr. is a classic example of early Viennese social dance music. It is marked by a strong sense of forward motion and characteristic rhythmic vitality.
The difficulty is achieving a crisp, non-percussive articulation in the fast passages.
Comparable difficulty and character — good candidates for what to learn next.
Brüder Lustig (Op.155) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
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 Brüder Lustig (Op.155) lasts about 3 minutes.
Brüder Lustig (Op.155) 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 Beliebte Annen-Polka by Johann Strauss Sr., Boulogner-Galopp by Johann Strauss Sr., Beliebte Kathinka-Polka by Johann Strauss Sr. — see the full similar-pieces list on this page.