Hope I’m not too late. I just interviewed over a dozen people for an IT position so I have some experience as an employer
Be enthusiastic, be confident, if you don’t know the answer say ‘i don’t know but I’ll Google it later!’ because tech skills are not as important sometimes, it’s more like how will you get along with the team. Treat it as a fun opportunity to talk about your goals. Make sure you ask them questions, like what is the rest of the onboarding process like, how many more interviews, are the opportunities to grow in this position, is this a new position or am I filling in for someone who left? How many people on my team? And then end the interview by saying ‘i look forward to working with you’