This is a set of variations by an obscure 19th-century composer following the strict Classical style. It features idiomatic keyboard writing typical of post-Mozartian salon music.
The primary challenge is maintaining consistent articulation and evenness in the rapid scalar passages.
Comparable difficulty and character — good candidates for what to learn next.
12 Variations in B-flat major (Op.1) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
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 12 Variations in B-flat major (Op.1) lasts about 8 minutes.
12 Variations in B-flat major (Op.1) 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 Piano Sonata No. 16 in C major by Wolfgang Amadeus Mozart, 12 Variations on "Ah vous dirais-je, Maman" by Wolfgang Amadeus Mozart, Maple Leaf Rag by Scott Joplin — see the full similar-pieces list on this page.