This works. I've presented 30 min to full day talks without slides or notes. How? I remember the stories I want to tell.
Speaking like this is like being a (less funny) comedian. Flow, through stories.
It's hard to sound natural if you memorize every word. But it's easy to sound natural if you tell stories you know.
More: seths.blog/2019/06/awkwar…
Instead, look up. Tell your stories.