In my own experience, because I am also in this line of work, I know that this kind of service is credible, because there is a demand for providing this kind of service, and things must be reasonable. If this kind of service was not recognized or prone to problems, it would have been eliminated long ago.
You can add any questions. If you think they are helpful, please adopt them.
(1) What is the essential difference between basic education and vocational education?
Basic education is relative to higher education, and vocational