As the others mention, it should just be a file download and few minutes with a cd writer. To confirm though, what steps have you taken so far or how far have you gotten?

Did you download the .ISO (disk image) from the Ubuntu website?

Where you able to write it to a CD or DVD using your choice of cd writer software?

Where you able to boot from the disk and get the Ubuntu desktop (it'll run without installing so you can confirm if it works).

If you where able to boot from the disk into the usable desktop, could you browse websites (network card is working)?

One of the regulars can probably suggest the next step from as far as you've gotten.