Oesten's "Morceaux de genre" are character pieces often evoking simple, pleasant moods. They are characterized by lyrical melodies and straightforward harmonic progressions, suitable for drawing-room performance.
Pay attention to legato phrasing and ensure a smooth, flowing melodic line.
8 Morceaux de genre (Op.92) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
8 Morceaux de genre (Op.92) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.