You're not going to get MC32 onto the DAP itself, that's not possible. Ripping CDs to FLAC is fine, a lot of people do this (including myself), just make sure as RobMac mentioned you have the space to store it. Also there's a chance the A&K may not work with MC32 at all, I've heard reports over the years of A&K devices not working with/not being detected by MC, and it being on a Mac too, there's a chance it may not work or detect it.
I'm just saying if it doesn't work and/or if it isn't even detected, don't be surprised.