Start with economics. They can’t understand anarchism unless they understand concepts like opportunity cost or supply and demand. There’s a reason state schools don’t teach that stuff. Maybe buy them a introductory economics book. Or just be honest, tell them you would like to see them enlightened. But it’s a serious intellectual effort, and depending how much of their time and attention you have it might not even be possible. Don’t make it about anarchism, that just scares them off. Make it about economics.