This sonata is celebrated for its evocative, bell-like qualities and idiomatic guitar-inspired writing. Its charm lies in the playfulness of the repeated notes and the elegant, light-hearted melodic lines.
The repeated notes must be executed with extreme evenness and lightness to achieve the intended bell-like effect.
Comparable difficulty and character — good candidates for what to learn next.
Keyboard Sonata in E major (K. 380) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Keyboard Sonata in E major (K. 380) lasts about 4 minutes.
Keyboard Sonata in E major (K. 380) 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 Keyboard Sonata in C major by Domenico Scarlatti, Keyboard Sonata in D minor by Domenico Scarlatti, Keyboard Sonata in B minor by Domenico Scarlatti — see the full similar-pieces list on this page.