[Koha] how do I use z3590 with coha for shared cataloguing from Italian libraries?

[La Biblioteca del Garibaldi]

I am *really really* new at all this.

I'm working in an Italian school library.

My computer has a windows OS  so I followed all the instructions given to
run koha on a virtual box see here:
https://docs.google.com/document/d/1W4vUwEQK5alc474WEt0h38qQ5VOGJxPpnJiytxJSgu0/edit

What now?

For example how do I get to do shared cataloguing through z3590 protocol?

After setting up I only see a few US libraries. Famous, prestigious but at
the moment of no help to me. I need to catalogue Italian books from Italian
libraries for example from here:

http://www.sbn.it/opacsbn/opac/iccu/free.jsp

Camilla BiblioDoc
teacher librarian