A classic set of variations on a popular Elizabethan folk tune found in the Fitzwilliam Virginal Book. It displays Byrd's mastery of keyboard figuration during the English Renaissance.
Precision in execution of the various rhythmic ornaments is essential to maintain stylistic integrity.
Comparable difficulty and character — good candidates for what to learn next.
All in a Garden Green, FVB 104 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 All in a Garden Green, FVB 104 lasts about 3 minutes.
All in a Garden Green, FVB 104 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 All in a Garden Green, T 430 by William Byrd, The Entertainer by Scott Joplin, 12 Variations on "Ah vous dirais-je, Maman" by Wolfgang Amadeus Mozart — see the full similar-pieces list on this page.