This is the first movement of Villa-Lobos's Bachianas Brasileiras No. 4, a suite originally conceived for piano that evokes a sense of pastoral landscape with its folk-inspired melodies and Baroque influences. It features a rich harmonic language and intricate contrapuntal textures.
Achieving a clear and balanced polyphonic texture while maintaining a singing tone in the melodic lines is the primary difficulty.
Bachianas Brasileiras No.4, W 264, 424 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.
A typical performance of Bachianas Brasileiras No.4, W 264, 424 lasts about 16 minutes.
Bachianas Brasileiras No.4, W 264, 424 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.