This Allemande is another exploration of the G minor key by Bach, likely intended for keyboard. Its musicality is marked by its somber mood and intricate contrapuntal development.
Pay close attention to the balance between the voices and the precise execution of all melodic figures.
Allemande in G minor (BWV 837) 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 Allemande in G minor (BWV 837) lasts about 2.5 minutes.
Allemande in G minor (BWV 837) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.