This is a characteristic ragtime piece by the prolific novelty composer Harry Jentes. It features syncopated rhythms typical of the early 20th-century ragtime tradition.
Maintain steady, crisp rhythmic precision in the syncopated bass lines.
Comparable difficulty and character — good candidates for what to learn next.
California Sunshine 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 California Sunshine lasts about 3 minutes.
California Sunshine 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 Among the Whispering Pines by Harry Jentes, Alexander's Ragtime Band by Irving Berlin, Waltz in D-flat major, No. 1 by Frédéric Chopin — see the full similar-pieces list on this page.