Can I make breaks or stop the recording when I want? Can I start again?

No, like a classic language test, you cannot stop the recording. So you cannot go back, answer the questions in a different order or answer a question a second time. 

You can only pause between two questions.

You cannot rerecord the answer you have given or see the title of the next question.

Likewise, like a classic language test, you cannot redo the interview.