If you're one of those nervous wreck types, soft spoken, or just plain afraid of blanking out at the interviews...then I'll say that your first interview will probably help you out the most. I went to my first one, and I really overdid it. The guy wanted to know me, but I came out swinging both arms like mike tyson.
After the interview, I calmed down and realized it wasn't so bad, and next time I should match the interviewer's tone. Fast forward to my second interview, I did well (I believe), because I was more relaxed and I had done it before.
Gl!🙂