High school students want to start with a camera SLR/single battery?

Single battery has both fashion and image quality. If you don't want to study photography in depth, single electricity is a good choice. SLR majors are of high quality, more playable and more professional. There is a saying that Nikon makes cameras and Canon sells cameras. I prefer the color of Nikon, Canon is too dull, but this question is still a matter of opinion. Recommend Nikon D5 100, a new machine. The lens of the dog's head 50mm fixed focus lens (a sharp weapon for portrait photography) is fine, and the aperture of 18~200mm is too small, which makes no sense ~