Would you like to help me to decide how to vote on referendum?

Background: Italian citizen, got citizenship through ancestry, never lived in Italy, I am not living in my country of origin too, i.e. I am an immigrant by any means.

I would like to vote, but I am not getting what's the problem, why do we have referendum at the first place?

Why to change current position of prosecutors? I guess there's a lot of corruption in juridical system there.

Etc, etc.