Simply follow the instructions on each site you wish to access. You will be asked to provide a user name and a password each time you want access to the site. The best known news agency is Reuters and their site has a 'news wire' showing the latest breaking stories. Plus you can view the foreign Reuters sites. Copyright Remember that images and text from other sites is usually protected by copyright, and cannot be used for commercial purposes without the permission of the site owner.
Most sites have details as to what can be copied and re-used and for what purpose.
Private study is often allowed. Check out the Daily Mail copyright page for a good example.