HP Envy printer setup

Since before Christmas, I have been trying to get a HP printer to work with Linux Ubuntu 20.04.6 LTS. 64-bit.
Gnome version is 3.36.8 Windowing system X11.
The HP Envy 6020 did have a defective scanner, and probable duff ink cartridges, but would print pictures OK, but not text.
So I now have a HP Envy 6032e, which the seller inisisted would work with Linux, and when I connected it, I was able to scan, so my Dell 7020 communicates via USB cable!
Currently, it is sometimes recognized as a scanner, and sometimes not, and if so, says "unable to scan".
The Dell 7020 computer recognizes it as ENVY 6000 series TH27MGF0K7, so sees the printer.
I have tried adding printer, but when I try a test page, it reports queue held. When I release the queue, the printer lights flash, and when I press the i button, I get a Printer Information Report printed perfectly.
So printer is recognized, and works, and scanner works. (or used to)
But doesn't print anything I want to print.
I downloaded HPLIP, which reports errors in the process, which runs for about half an hour.
I downloaded HPPSdr.exe which reports "error while loading the archive"
I downloaded from Sourceforge, as advised.
I have tried "Cups" which seems to make no difference.
I go via "activities" to printers, and get three entries, with slightly different names, and two different pictures, so it's there, but just won't do anything.
Sorry to make this such a long enquiry, the suppliers of the computer say "all HP printers work with Linux!" and it's just a matter of getting the setup right.
Please advise. All I want is the printer on the end of the USB to print stuff. I have been trying this for four months, dropped some printers on the tip, and returned some, leaving me with my original HP psc 1317 and two Envy's.
I keep telling myself it must be something simple.
Many thanks.
Geoff. Johnson.