This is a charming dance piece from the Classical era, likely a minuet or similar dance form. It features clear melodic construction and a graceful, elegant character typical of J.C.F. Bach's style.
Maintaining crisp articulation and a balanced dynamic range are important for this piece's clarity.
Anglaise in D major is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 5.
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 Anglaise in D major lasts about 2.5 minutes.
Anglaise in D major is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.