Different universities have different procedures. First and foremost, you need to find universities that provide scholarship to international students. You can just google it and narrow your search based on the country of your choice, your field of study and other requirements that you might have. The answer provided by Deepak HERE might help you get started.
After you have the list of universities, go to each of their website and look into ‘How To Apply’ or similar section. They might have mentioned about scholarship there. If not, do more searching in their website. If they provide scholarship they will mention how you can apply for it. Some universities consider you for scholarship when you apply to them, some of them would want you to submit extra information and/or extra writing supplement. Some may even invite you for an interview. They should have all that information in their website. If you can’t find that information, don’t hesitate to reach out to them. If you still have trouble getting that information then reach out to us and we will try to help you.