Our republic is a form of representative democracy, based on our Founders’ study of other past representative democracies.
If you don’t understand the difference between direct democracy and representative democracy, you need to repeat grades K-12.
I used to think gun nuts didn’t understand that difference. Now I’m convinced you do undersand it, and that you present this factully incorrect argument (“America is a republic, not a democracy”) as a way to assert your authoritarian worldview while trying to slyly disguise it.