I think if you have some credentials and can prepare a course that will enhance new shooters' appreciation of handguns and shooting, you should definitely offer a course. If on the other hand, you, like a lot of us, are simply an avid shooter who has seen how people get steered into initial/early handgun purchases without a good knowledge base and want to help folks up the learing curve and avoid buying the wrong gun, that's an admirable goal. But I'm not sure how much you could charge for that. Most folks want to pay for classes that will satisfy a requirement like a CCW license. But you can sure give it a try and see if there's interest.