thank you for giving me information but what if I do not have friends from abroad because I'm from Indonesia and not so much to have friends in foreign countries? What if I do not have extra money to attend university abroad? whether there is usually a university that provides scholarships?

Make a friend from that country and ask which universities are good. Find out if that university will accept students from abroad. Nearly every country has a student visa system. If you get accepted for a university, it is easy to get a visa. So basically, it depends on how much money you have. If you can afford the university fees and they accept you, then you can study abroad.