A charming piece from the Classical era, 'Ambroise' would likely feature a clear melody over a transparent accompaniment. It would exemplify the period's emphasis on grace and balanced phrasing.
Focus on creating a smooth, legato melody with a light, even accompaniment.
Ambroise is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
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.
Ambroise is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.