IELTS speaking band 9

I cannot speak at all. I have not studied in English medium and I can't understand what to speak because words come to my mind in my first language only.

  The International English Language Testing System ( IELTS ) is an international English language examination. It is offered to students of non-English-speaking universities, colleges, and other tertiary institutions. The IELTS is a three-hour test, divided into four parts: Reading, Writing, Speaking and Listening. There are four major sections of IELTS  -  READING📖, LISTENING 👂, WRITING✏, SPEAKING👨