Hi FiguringItOut, unfortunately I bought that SIM in the UK before my trip. Here it is:
https://www.argos.co.uk/product/2994695. I was just giving an example of the sort of prices you may expect to pay in the EU for a similar card and how they work. I don't think EE have any shops in Italy, but Vodafone is a similar network provider, which does have shops in Rome. "Three" is another mobile network provider that sells similar cards in the UK (like this
https://www.argos.co.uk/product/5858374) and also has a presence in Italy with shops in Rome
https://www.tre.it/assistenza/negozi-3?city=roma. I am so sorry if I confused you, I'm terrible at explaining myself sometimes.
I can't really speak much Italian (only please/ thank you/ two beers, for example), but I found the google translate app helpful. If you download the Italian part of the app on to your phone before you leave, you can type what you want to translate into the app and use it offline. You can also 'read' signs in English using the app/camera.
We loved Naples.
It is a hectic and gritty city though. There's a lot of homelessness, graffiti (everywhere), and some litter. It's not picture perfect in places, but I thought it was beautiful underneath and I loved the people, history and architecture. We didn't experience any crime, and we were out until about 9-10 pm most nights (with two young-ish kids); however, we did take sensible precautions as you would in any major city. I felt we could have stayed much longer than a week. There's loads to see in the area and it's cheap and easy to get to Pompeii and other places of interest. If you ever stay there, I'd recommend getting the Campania Artecard or Naples Artecard.
https://www.campaniartecard.it/?lang=en.
I hope you have a fantastic time in Rome with your friends. How exciting! Let us know how you enjoy.