This is a salon-style character piece typical of the late 19th-century parlor repertoire. It features a simple, song-like melody supported by light broken-chord accompaniments.
The primary challenge is maintaining a consistent, singing melodic line against a delicate harmonic background.
Comparable difficulty and character — good candidates for what to learn next.
Beside the Sea is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 3.
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 Beside the Sea lasts about 3 minutes.
Beside the Sea 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 Believe Me, If All those Endearing Young Charms by Irish Folk Music, "s'kommt ein Vogel geflogen" by Siegfried Ochs, Au Hameau (In the Hamlet) by Franz Behr — see the full similar-pieces list on this page.