This is a charming salon-style piece by the Irish composer and pianist William Vincent Wallace. It is distinctive for its typical Victorian-era sentimentality and simple, melodic elegance.
The main challenge is maintaining a consistent singing tone in the right hand melody while managing the delicate accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
'Tis Pleasant to Be Young is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 'Tis Pleasant to Be Young lasts about 3 minutes.
'Tis Pleasant to Be Young 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 Bohemian Melody by William Vincent Wallace, 'O sole mio by Eduardo Di Capua, Believe Me, If All those Endearing Young Charms by Irish Folk Music — see the full similar-pieces list on this page.