Schubert's 'German Dances' D.972 are delightful short pieces that exemplify his mastery of the waltz form. They feature elegant melodies and often incorporate contrasting moods within their brief span.
Achieving a light, crisp articulation and managing rapid scale passages with evenness is important.
3 German Dances (D.972) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 3 German Dances (D.972) lasts about 6 minutes.
3 German Dances (D.972) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.