The recommended ARM 32-bit hardware is the i.MX6 Sabrelite. Please see its setup guide for first-time setup. The following optional extras may be of interest.

If you currently don’t have access to any supported hardware, the amd64 images can be run on a virtual machine.

Reference Hardware Status Comments
ARM iMX6 reference board i.MX6 Sabrelite Tier 1 Setup guide