This Allegro moderato from Catoire's Op. 6 is a dramatic and harmonically rich piece. It features intricate inner voices and requires significant control over voicing and dynamics.
Pay close attention to balance between the melodic lines and the rich harmonic texture.
6 Pieces (Op.6) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
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 6 Pieces (Op.6) lasts about 4 minutes.
6 Pieces (Op.6) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.