It is a true fact that anyone who has been involved in or has hired themselves has a tough time switching seats. It comes naturally to you to want to take the lead seat at the table. Train your brain. This is not your chair. This will be one of the hardest brain-trains you will need to accomplish.
Finding the path to presenting yourself as an interviewee takes practice and mindset alteration. You know that body language is a huge indicator of what you are thinking and how you are coming across to the interviewer.