Charles Kinkel was a prolific composer of salon pieces, and this march represents the virtuosic, showy end of his output. It includes typical late-Romantic technical flourishes such as octave passages and bold chordal writing.
The octaves require a relaxed wrist to ensure power without tension.
Comparable difficulty and character — good candidates for what to learn next.
Blue Bells March is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
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 Blue Bells March lasts about 3 minutes.
Blue Bells March 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 100. Yıl Marşı by Hakan Ali Toker, Brigadier-Marsch by Béla Kéler, Bunker Hill by Albert Von Tilzer — see the full similar-pieces list on this page.