On the one hand, objectively, I recognize in hindsight I made a lot of mistakes.
On the other, subjectively, I felt at ease the entire interview, relaxed, and largely in control.
I'm not sure how I actually did. I could have totally botched it.
But I'm happy no matter what.
It was an interview. I didn't panic. I wasn't anxious. I was calm. I largely didn't stutter, aside from the one time they did manage to trip me up. (They asked me what non-work activities I do. The trip-up isn't in what I do. I can tell them that. It's in trying to find a way to tell them what they wanted to hear, and given that question, I didn't have much of a clue what they were going for.) I responded to each question, and if I didn't give them what they were looking for, too bad, but I certainly tried.
Plus...first company who actually bothered with an interview, that's related to CAD. So, that means I'm not utterly hopeless in the job market. A little outclassed and out of my element, yeah. But not an instant dismissal.