One of the best pieces of advice I was given about interviews was turn the tables and take the perspective you?re actually interviewing them to see if you would actually want to work for them, helps with confidence amazzingly., but as others have said be as prepared as possible know about the organisation and the job as much as possible. Be prepared for cringe questions like give an example of how you dealt with conflict, giving an example, name 3 good things about yourself. Good luck