Scarlatti's Sonata in D minor is a vibrant, driving example of his single-movement binary form style. It is distinctive for its rhythmic drive and the clear, harpsichord-influenced articulation required to bring its themes to life.
Maintaining a crisp, consistent touch across the rapid runs and turns is the main technical hurdle.
Comparable difficulty and character — good candidates for what to learn next.
Keyboard Sonata in D minor (K. 1) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 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 D minor (K. 1) lasts about 3 minutes.
Keyboard Sonata in D minor (K. 1) 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 B minor by Domenico Scarlatti, Piano Sonata No. 16 in C major by Wolfgang Amadeus Mozart, Bugatti Step by Jaroslav Ježek — see the full similar-pieces list on this page.