I love the old saying, “Don’t take life too seriously. No one gets out alive.”
Taking yourself too seriously destroys your focus. That’s always true and certainly it’s true when you’re speaking.
Keep your focus where it belongs (on helping your audience) and forget about trying to impress the audience. In the end, they’re more likely to be impressed if you’ve answered their questions, addressed their concerns, solved their problems.
So, you’ve solved your problem and theirs just by staying appropriately focused.