What does the auxiliary camera mean? I want to learn portrait photography. Mine is Canon A640, is that all right?

I haven't heard of it. Generally, there are standby machines, that is, SLR and quasi-professional or telephoto or card machine. A640 is equipped with manual, aperture priority and shutter priority, which is suitable for learning models. However, due to the limitation of lens, it is still difficult to achieve some special effects ... The success of a photo depends on the person behind the viewfinder, not the machine. Come on!