This is a fugue from Telemann's 'Sing-, Spiel- und Clavier-Übung'. It features intricate contrapuntal interplay between voices.
The primary challenge lies in maintaining clarity and independence of each voice within the fugal texture.
Bittet, so wird euch gegeben, TWV 1:129 is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 Bittet, so wird euch gegeben, TWV 1:129 lasts about 3.5 minutes.
Bittet, so wird euch gegeben, TWV 1:129 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.