Looking in /dev/usb shows a file by name of 1p0.
that does not seem familiar.
This is your USB printer.
Question: is that it.
does the whole operating system need to be re started.
does the user account need to be rebooted.
The device block is lp0, first letter is a lower case L not a number 1. No, you do not need to restart anything.
To get the printer working, you will need cups installed. Then you need the kernel module ( driver) for your printer installed. It may be there, if you have a common printer, or available from the Deb repos. You need to configure the printer in cups. I have never done it without a gui. Cups user interface is through a web browser. If you do not want to use it, you will have to research how to configure your printer.