The school can give you an IELTS score exemption letter according to your junior high school English score. If you don't have IELTS scores, you can apply for a visa with the school's exemption letter.
Third, junior high school grades decide admission.
A good school can decide whether to admit you according to your grades in junior high school for three years. Some admissions are direct and do not require an interview. Some need an interview before admission, and some need an interview after your English course. Different schools have different admission methods.
There are various interview methods.
The school will tell you about the admission. Most schools don't need interviews. When you apply for a school, the school will tell you about the admission. Most schools don't need interviews.
Take English classes for 20 weeks.
Generally, English classes without IELTS scores are 20 weeks. Then take high school courses.