Two types of anxiety: the one that fills you with terror and the other one that tends to rush you.

A solution is framing: how to look at the situation.
A framework proposes to frame a presentation or an oral intervention with the following scale:

• Practicing / Perfection
• Enthusiasm / Audience
• Prepared / Flawless
• One of many / The big one
• Sharing Enthusiasm / Giving a presentation

The right side of this scale is what people normally imagine when they hear public speaking. It is however the wrong framing.

The positive frame would move to the left side of the spectrum. It is just practice, being enthusiastic, only preparation is needed, this is one of many public speaking so get ready for the next one too.

The trick is to switch the focus from yourself and the audience to the ideas in the talk.

The reason it doesn’t matter is because the audience is not the point. And you aren’t the point either. It’s the content. It’s the idea.