Viereck's Op. 101 is an elementary piano work representative of the pedagogical literature of the 19th century. Its structure is simple and designed to reinforce basic hand independence and melodic projection.
At Henle 2 this is a beginner-level piece, where steady coordination between the hands is the main hurdle. The main demands: Alberti-bass accompaniment kept quiet and even under the melody; a true singing tone, with the melody floating above the accompaniment; and careful pedaling — clarity depends on the foot as much as the fingers.
Focus on balancing the Alberti-style bass so it does not overpower the primary melody.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Espoir (Op.101) is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 2.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 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 Espoir (Op.101) lasts about 2 minutes.
Espoir (Op.101) 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 Dein Eigen by Gustav Lange, 12 Variations on 'God Save the King' by Christoph Friedrich Beck, Crinoline by Albert Stoessel — see the full similar-pieces list on this page.