Welcome to the forum. I'll do my best to answer your questions:
- if I gather news bulletins and adapt them by translating and referring to all the original sources with a small description, will this be illegal?
It will be an infringement of copyright, and the new sources will be entitled to take legal action against you. This is true regardless of whether the copy is in the original language or is a translation. Adding a reference to the source doesn't change that.
How can I have news if I do not own a news company, I find this very difficult to understand.
News agencies generally license their content to small publishers and website operators, for a fee. In fact, that's what they're in business for. You can legally re-publish their content, provided you pay the agreed fee.
There are a couple of other approaches you could consider:
- Do your own research for a particular news story, by reading about it in several different places (preferably in both English and Italian), then write up your own version entirely in your own words. Where the original story contains information based on someone else's research (for example, a survey they have conducted), you can quote that information, provided you cite the source correctly, (For example: 60% of immigrants never cook Italian food, according to a survey by XX.)
- if I give suggestions on what are the procedures to be followed in USA, but after 2 months something changes and somebody goes in trouble by following an outdated solution given on my website, will that be a problem for me?
In theory, yes. You are holding yourself up as an expert in a particular field. If someone suffers a loss because of your bad advice, they might be able to take legal action against you. But they would have to be able to show that you did not exercise sufficient care in giving the advice.
For example, if you carefully researched the law on student visas, and published the results of your research, and then the law changed without any warning or notice (highly unlikely, but this is just an example), and if someone acted on your advice within an hour of the change taking effect, you could probably argue that you took sufficient care in giving the advice and couldn't be blamed for what happened. But if you never get round to updating your site with the new information, and someone suffers a loss by acting on it many months later, you would be in a much worse position.
The usual approach would be to post a very clear disclaimer on every page of your site, to the effect that you believe the information to be correct but cannot guarantee that it is, and the reader should satisfy himself as to the accuracy of the advice before placing any reliance on it.
I hope this won't discourage you. Keep in mind that many thousands of website operators successfully give legal and technical advice every day without being sued. You've just got to be very careful that you do it right.