This is a commemorative piece dedicated to Abraham Lincoln, written in a solemn, elegiac style typical of mid-19th century American parlor music. Its simplicity of form serves to emphasize its sincere and mourning character.
Students must focus on sustaining long, expressive melodic lines without losing the forward momentum of the piece.
Comparable difficulty and character — good candidates for what to learn next.
"In Memoriam" A. Lincoln 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 "In Memoriam" A. Lincoln lasts about 3 minutes.
"In Memoriam" A. Lincoln 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 'Who Knows?' by Ernest Roland Ball, Canto del Bardo by José Ferrer, Black Eyed Blues by Don Kendall — see the full similar-pieces list on this page.