I want to study commercial photography.

SLR is essential, and the minimum level is D80. We need a fixed-focus macro lens, a tripod, a set shed, a number of photographic lights, a background cloth and a number of reflective soleplates.

In addition, you need to be proficient in PS. PS is not everything, but you can't do anything without PS. PS can reduce your shooting cost and make your photos icing on the cake (note that PS can only be icing on the cake, and you can't PS a poor photo into a beautiful photo).