This is a light and effervescent piece by Schubert, likely showcasing variations on a joyful 'Alleluia' theme. It's characteristic of his early works, balancing melodic charm with technical facility.
Focus on clarity and lightness in rapid passages and varied articulation.
Alleluja in F major (D.71a) 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 Alleluja in F major (D.71a) lasts about 3 minutes.
Alleluja in F major (D.71a) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.