Course in a language school
Preparation for Cambridge English exams should be conducted exclusively by qualified, experienced teachers. A quality school will be able to provide you with all the information related to the Cambridge English exams. To be eligible for the course, you will take an entrance test and an interview to find out what timeframe is realistic for you to be able to pass the exam.
In Brno and its surrounding region, we recommend Jazyková škola P.A.R.K for preparatory courses Jazyková škola P.A.R.K. 
https://www.skolapark.cz/
In Prague and its surrounding regions, we recommend Jazyková škola Zpěváček 
https://www.jazykovka.info/