Turning American Resume into Italian/European CV

I'm an American undergraduate student (already accepted my IB SA offer here in the US) and am applying for competitive study abroad programs in Italy. They all require me to have a CV, so I am wondering what I need to include on it, how I can convert the American resume I used for IB recruiting, etc.

Are there any typical things you would include on an American resume that are red flags on a European/Italian CV? e.g. would including my "Incoming Summer Analyst" role or volunteer work be a bad idea?

would appreciate any websites/resources that might be helpful for further reading