Lumbye was known for his virtuosic and popular dances, and these galops are likely to be spirited and rhythmically engaging pieces. They would have been performed to encourage dancing and lively entertainment.
Maintaining a fast tempo with clear articulation and driving rhythm is the primary technical challenge.
2 Galops, JLW 539 is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6.
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 2 Galops, JLW 539 lasts about 3 minutes.
2 Galops, JLW 539 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.