will give genuine advice here but make sure when they say any questions, actually ask questions ^^ itll make you look like youre paying attention and care for the job
Make eye contact. Your flag is set to New Zealand. In Eastern cultures you're somewhat expected to show respect, act subtle and humbly. In Western cultures, they will probably prefer if you look them straight in the eye to indicate that you're confident. gl m8
Seem enthusiastic during the interview, know about the company throughly when interviewing (make it seem like you did some research and you are gennuinely interested in joining them), and act modestly.