Introduce yourself from several aspects:
1 You are excellent in any major, which can be said to be very specific.
What have you done before? What this company wants from you must be related to your experience. )
What is the purpose of coming to this company now (of course, you can tell lies, as long as you like this job).
Finally, it is aimed at your positioning: you can talk about your advantages. Where are you better than others?
You can put yourself in the other person's shoes, so the problem is not difficult.
This is my experience of interviewing n times, which is definitely no problem, but the specific problems should be analyzed in detail. Finally, I wish you success in finding the job you want!