Financial aid for foreign students is scarce & extremely competitive. E.g. there are a few universities with endowments which allow for foreign student applicants (Yale, Grinnell). You must be one of the top students in the world to have any chance at these - you must be one of the top students in the world even to have slim chance of being accepted! Many countries & many schools have no financial aid whatsoever for foreign students.
Full scholarship typically refers to full-tuition, and you still must pay all your additional school + living expenses + return transportation to your country of citizenship. IF a university accepts you, you must prove you & your parents have sufficient funds for all school + living expenses + return transportation to your country of citizenship to apply for a student visa.
Put first things first. Which language(s) are you fluent in at a high academic-technical level of proficiency? You must be fluent in the country's language, so this limits which countries you can consider. Next, what's your intended field of study, and which universities are highly respected in that field, and respected by employers in your country (since that's the only place you can work when you graduate)? google-search university rankings by country or internationally, and overall ratings as well as ranking in your intended field of study.
You & your parents are going to need money. Study abroad is a luxury & you pay for your luxuries. Expect to prove you have a minimum of USD50,000/yr for 4 yrs to study in US; CAD40,000/yr for Canada; AUD65,000-75,000/yr for Australia; GBP30,000-40,000/yr for UK. You need more than average costs for certain high-cost fields, e.g. sciences, technology, engineering, math textbooks cost more than average; you may need special equipment, computer software, etc, for your field, etc.