This is how I got my first Ubuntu isos. In 2006ish I had a bondi blue iMac G3 that I got from a friend. I wanted to put Linux on it but my Internet was pretty meh so I ordered the Ubuntu disks for all three supported architectures at the time. I never got it running on that iMac because it would kernel panic while loading from the disk.
This is the answer, if you’re not in academia you likely need to be in logistics, maintenance, or be a doctor/nurse.