Cramer's studies are foundational pedagogical works designed to develop specific pianistic techniques. These pieces are essential for building technical fluency and musicality.
Concentrate on evenness of touch and clean execution of rapid passages.
84 Celebrated Studies for the Pianoforte is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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.
84 Celebrated Studies for the Pianoforte is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.