Good luck on Friday.
In my "previious life" I spent 30 years working in IT and over the years recruited more people than I probably care to remember.
If asked to provide examples it is useful, but not essential, to include examples from relevant areas of work. However in your case as you are just starting out then any examples will be better than nothing. Even hobbies and interests can be called upon.
If the interviewer is any good they will be looking for potential as well as experience, again especially with somebody at your stage career wise. Indeed in the past I have, on more than one occasion, "taken a punt" and given a job to people who I thought had the potential over those who had the technical knowledge immediately available. Skills can easily be taught to the right people.
It is also perfectly OK to say "I don’t know" – especially with technical questions. I used to ask technical questions which I thought were beyond the capability of the candidate. If they tried to bullsh1t their way through the answer it would go against them. I much preferred someone who knew their limitations and is prepared to admit it Also as I suspect you know already when it comes to the technical questions it can be very dangerous to BS – you never know how much the interviewer actually knows.
Let us know how it goes.