You will need an OS on the Amiga to transfer the ADF to a real disk, but if you have no OS you are SOL. You need to get the ADF to a read disk before you can use it on the Amiga. A real dilema I am afraid.
Option 1: Buy a Catweasel controller for the PC to write ADF's to disk. $100+ if you can find the ISA/PCI card.
Option 2: Have someone write the ADF to disk for you.
Option 3: Purchase a set of disk from someone or vender.
You're call.
Good luck.