Louis Lavater's '3 Waltz Moods' are characteristic short pieces, exploring different emotional shades through the waltz genre. They are marked by their appealing melodies and idiomatic piano writing.
Pay close attention to the nuances of phrasing and dynamics to convey each mood effectively.
3 Waltz Moods 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.
3 Waltz Moods is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.