Hi,
Fwiw some thoughts about interviews-did my first one last week for about 10 years!
Firstly....do some preparation
Have a think about what questions are they likely to ask (for me, this was things like why you, why do you want this job, 3 words to describe yourself etc,what's great about your company/job, where can you improve, what are their challenges etc, what ideas have you for change)
Have a think about how you'd answer. What are the words that you'd want to get across (e.g. Commitment, enthusiasm, determination or whatever)
Watch for the 'give me an example of a time where you've done x' (shown initiative/had to deal with difficult colleague or customer etc)
Think of your answer in terms of situation/action/outcome, e.g
What was the situation
What did you DO about it
What was the outcome
You'll know what did/didn't go well last time. So practise those type questions! Don't learn an answer, just think about how you'd answer it
Find someone else to help you - either coming up with questions, or listening to you and giving some feedback.
On the day...
Know that you've done your preparation
Wear something which makes you feel good/confident about yourself
Take a couple of deep breaths!
Remember to smile (helps project confidence/enthusiasm etc)
Don't be afraid to ask 'can I have a moment' if you want to think. Or ask them to repeat it (had a 2 part question last week and totally forgot what the second part was by time i'd answered first)
Don't talk yourself down. I feel uncomfortable blowing own trumpet but if you're going to do it anywhere, quietly proud in an interview is where you need to do it.
Have some questions for the end
Hope that helps. Best of luck and know yourself that you can do it x