Thanks for being so helpful guys.
This doesn't sound like a happy situation. I feel a bit daft now, I should have done more research before just jumping in.
At the risk of asking more daft questions:
Why would anyone release an OS for a platform no one can practicably buy??
Why wasn't it written to run on for instance a Mac or PC, or even a 'more standard' 68k Amiga..?
Should I consider cancelling my order?