I read through it years ago, it's a similar difficulty level as the Grieg, Schumann and Gershwin Concerti.
I write a very good Concerto, don't you think? 
Yes, you do.

Hmm, do you think I could learn this soon? To give an idea of where I stand, here's what I'm learning now:
Bach Dm Concerto
Bach P&F Fm Bk.I
Grieg Sonata
Schubert Impromptu in Gb
Mozart C minor Sonata
Rachmaninoff G#m prelude 32-12
What would I want to play beforehand to get a grip on the musicality and technique? I have never heard or played any of Arensky's music before, so I suppose some of his other works would be a good first step.
Phil