If you have a degree certificate, study abroad step by step.
In addition, I suggest you see if there are any overseas relations schools in the school. If the school has places for exchange students, it will definitely save money than looking for an intermediary.
The key to studying abroad at one's own expense
1 passed the foreign language threshold test (TOEFL IELTS /J-text ...) in the corresponding country.
Contact the school and pay tuition fees for admission (the money varies from region to region, but you can earn it back if you basically go out, as long as you make up your mind)