Dalayrac was a composer of opéra comique, and this title suggests a lyrical piece, likely a romance or air. It would feature a clear, singable melody with a simple, supportive accompaniment.
Focus on clear melodic articulation and a light, transparent accompaniment.
Adèle et Dorsan 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.
Adèle et Dorsan is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.