I've certainly stumbled over a scripted intro that I thought was clever, too, and had it not land at all. I'm glad you didn't let it derail you.

Public speaking takes practice. Some things hit, other things dont. Just remember it for next time. It all depends on the crowd you are talking to. I remember being super nervous when I first started teaching. Then I figured out I know way more than anyone else about the subject. That in itself gives you confidence.

When presenting topics like this it helped me a lot to record myself and listen to it (use whatever, your phone, your video call software...). I also like to write exactly what I'd like to say. I don't use this written text, but it really helps to see the talk written down. Especially when the talk is short, this is not that big of an time investment.