Black Soda Blues is an obscure mid-century style blues pastiche for solo piano. It features standard 12-bar blues progressions adapted for a classical keyboard format.
Focus on the nuance of the blue notes and maintaining a relaxed, swinging feel in the left hand.
Comparable difficulty and character — good candidates for what to learn next.
Black Soda Blues is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 3.
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 Black Soda Blues lasts about 3 minutes.
Black Soda Blues 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 Brier Street Blues by Cameron Lee Simpson, Blue Mood! by Cameron Lee Simpson, Breakfast At The Bayou by Cameron Lee Simpson — see the full similar-pieces list on this page.