Scriabin's approach to the canon is colored by his characteristic chromaticism and sensitivity to color. The piece is distinct for its blend of traditional form with a late-Romantic expressive language.
Use sophisticated rubato to enhance the lyrical quality of the voices.
Canon in D minor is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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 Canon in D minor lasts about 2 minutes.
Canon in D minor is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.