What is the proper way to sing?

I want to know how to sing, like my favorite singer Chester Bennington from Linkin Park. People say that you dont use the throat use the diaphragm. Im like what do you mean, whats a diaphragm and how do you use it. I heard u push with the stomach to get the diaphragm to work. What the heck does that mean! what am I pushing? How can a stomach push? When I tried to do it she said no, your flexing your abs, dont do that, breath out and push the diaphragm. What the heck does that mean!? Can someone help me be a great singer like Chester Bennington and be specific cus I do not know what people mean in singing terms. Thanks to you all.