A very basic entry-level composition designed for pedagogical use. The melody is simple and relies on standard diatonic structures.
The main challenge is achieving an even touch and a singing tone in the right hand.
Comparable difficulty and character — good candidates for what to learn next.
Barry's First Opus 1 is rated Henle level 1 of 9 — beginner repertoire, roughly ABRSM grades 1–2. In the RCM system it corresponds to about level 1.
You should be comfortable at Henle level 1. 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 Barry's First Opus 1 lasts about 1 minute.
Barry's First Opus 1 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 BarrysFirstOpus1 by Teo Vincent IV, Blaue Aeuglein by Friedrich Burgmüller, Bud of Promise by Septimus Winner — see the full similar-pieces list on this page.