Juan Parga was a noted guitarist and composer, and his piano works often translate a Spanish guitaristic idiom to the keyboard. This piece captures the melancholic, nocturnal atmosphere common in his writing.
Use deep, sympathetic pedaling to emulate the resonance of the guitar while maintaining the lyrical arc of the phrasing.
Comparable difficulty and character — good candidates for what to learn next.
Alhambra is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
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 Alhambra lasts about 4 minutes.
Alhambra 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 Brigg Fair by Percy Grainger, Balada de Mallorca by Manuel de Falla, Berceuse - Cradle Song by Armas Järnefelt — see the full similar-pieces list on this page.