Victorin de Joncières was better known for operatic works, and this piano piece reflects a theatrical, vocal approach to the instrument. It is characterized by expressive, flowing melodic phrases.
Developing a singing tone in the upper register is essential to capture the operatic quality of this music.
Comparable difficulty and character — good candidates for what to learn next.
Bonjour Suzon 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 Bonjour Suzon lasts about 4 minutes.
Bonjour Suzon 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 Camarade by Emile Waldteufel, 'O sole mio by Eduardo Di Capua, Waltz No. 2 by Dmitri Shostakovich — see the full similar-pieces list on this page.