Or should I just read that to be aware of the type of questions likely to be asked?
May I recommend that you go through the Appendix to Standards Document 10(A): identify questions which you cannot easily or fully answer, and do the necessary research to fill those gaps in your knowledge. There is no shortcut to gaining the background knowledge and understanding required to become an instructor. Your FIC Instructor will also help you to focus your study once you're on the course.