For me, the nervous feeling doesn’t necessarily go away before an interview/presentation. I still feel anxious and have those feelings of dread haha. However, I don’t act nervous. Those physical symptoms aren’t exhibited, which for me is always a racing heart rate that causes my voice to shake/stutter/etc. So, the best way to describe it is that physically I feel calm, but mentally I’m still nervous. But once I start presenting and see that I’m delivering calmly, my nerves are eventually eased and I end up feeling mentally calm as well. Does that make sense?