This nocturne is celebrated for its lush, operatic melody that floats above a delicate, shifting accompaniment. It is distinguished by its intricate coloratura-style ornaments which require a high degree of pianistic refinement.
Refining the delicate, rapid filigree in the right hand so it remains atmospheric rather than mechanical is essential.
Comparable difficulty and character — good candidates for what to learn next.
Nocturne in F-sharp major, No. 2 is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Nocturne in F-sharp major, No. 2 lasts about 4 minutes.
Nocturne in F-sharp major, No. 2 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 Ballade No.3 by Frédéric Chopin, Étude in E major, No. 3 by Frédéric Chopin, Barcarolle in F-sharp major by Frédéric Chopin — see the full similar-pieces list on this page.