This is a sentimental parlor-style piano transcription based on Alfred Tennyson's famous poem. It is distinguished by its vocal-like melody and harmonic warmth typical of 19th-century American salon music.
The primary challenge is maintaining a singing legato tone in the melody while balancing the accompaniment beneath.
Comparable difficulty and character — good candidates for what to learn next.
'Break, break, break' 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 'Break, break, break' lasts about 3 minutes.
'Break, break, break' 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 'O, morning star' by Alfred Humphries Pease, 'Red cloud' by Alfred Humphries Pease, 'La Perichole' by Alfred Humphries Pease — see the full similar-pieces list on this page.