There is only one person who cares what you do with your hands when you are making a presentation.
And you shouldn’t care, either.
Here’s the thing—if you are connecting with the audience, they don’t care. If you have carefully considered what you want them to get from your presentation, it doesn’t matter what you do with your hands. In fact, when you have spent thoughtful time creating the experience you want the audience to have, your hands will take care of themselves.
When you are worried about your hands, it’s a sign that some other work has not yet been done. Go do that work.