Have you considered applying to colleges in the US and then doing a study-abroad semester or two? This is a great option that would allow you to transition into college-life while studying in the familiarity of the US, then when you have your bearings, you can apply for a study abroad college semester practically anywhere in the world. Another benefit is that you could do multiple study abroad semesters in different locations - say one in Europe and one in Asia, allowing you to explore very different continents. [Tip: Be sure to talk to your home University to ensure all credits from study-abroad classes will transfer.]
If your heart is set on spending your entire college years internationally, this is also an option! You can apply to international universities directly. Check out American University of Rome's admissions page for more information on how this works: https://aur.edu/admissions-finance
Adventure awaits. Good Luck!