"But how can I even start writing for those websites, newspaper, and magazines without any experience," you ask? If you’re in school and you can get an internship of some kind at an outlet you respect, you should absolutely do that. It may even be a good idea if you’re out of school, though it may pay poorly or not at all. Sorry: You are going to be poor for a while, at least, unless you have significant alternate streams of income. Make your peace with that now. A day may come when you need toinsist on your own value and stop doing things for free, but if you have no experience, today is not that day.
If you can’t get an internship, there are other ways to develop your writing and your resume. Seek out smaller startup websites or magazines who are doing the type of work you find interesting. They may not have the budget to pay much or at all, but if you find one you like and are willing to offer your skills — such as they are — in exchange for clips, connections and some degree of mentoring, that gives you something to bring to the next level of editors, perhaps ones who can pay you.