Dear Rob,
That is of immense help, and you are very kind to take the time to write.
I now have the network, and can see the computers and printer, but not use the printer. I have done everything in printer management I can think of doing, to no avail.
Still, being on the network is a huge advance.
Now, I have found out that there is really no way to play a DVD, in spite of the player being there, but this is of little consequence, as getting the printer printing is close at hand.
I deeply appreciate the thoughtfulness. One would think some enterprising soul would come up with "Linux for wusses," with genuine hand-holding support, but in the meantime, we are all a little like Blanche duBois.

Very best wishes,
Martin