Freeze your credit:
They are a very influential, very conservative American think tank. They advocate for things like anti-communism, neoconservativism, the Christian right, smaller government, bigger military, traditional family values, the wars in Afghanistan and Iraq, white supremecist ideas, voting restrictions - generally all the most destructive policies of the last 50 years.
Given that the source of this opinion piece is The Heritage Foundation I’m skeptical.
https://www.dnasquirrel.com/
This site walks you through how to take a DNA test anonymously. That’s as close as I’m aware of that you can get to privacy.