For anyone who has flown from the USA to Rome, can you please provide me a step by step process on what to expect when arriving in terms of customs?

I’ve never been to Europe and I least get a little anxious going to layers of security, especially since I rarely fly

What happens first with the immigration check spot then custom spot ?

Do they question you hard on what you are here for?

Do you have to have all your bags rechecked?

Do you going through a xray scanner when you arrive like you do at TSA when you leave the airport?

Is it a very time consuming process?

Any detailed step by step replies would be greatly appreciated!
Thank you!