This piece uses chromatic ambiguity to explore themes of uncertainty and hesitation. It is characterized by its sparse textures and intimate, conversational melodic writing.
Focus on the inner voices to ensure the harmonic tension is fully realized in the layered textures.
Comparable difficulty and character — good candidates for what to learn next.
... vielleicht - vielleicht auch nicht ... 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 ... vielleicht - vielleicht auch nicht ... lasts about 3 minutes.
... vielleicht - vielleicht auch nicht ... is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include '... Auch Wind kam auf. Wind' by Armin Fuchs, !shorter!longer!shorter! by Armin Fuchs, ... oder etwa doch? ... by Armin Fuchs — see the full similar-pieces list on this page.