With any quality Nikon, Cannon (my choice) or even Sony DSLR, combined with a quality Macro lens, you are well on your way to creating good Macro photographs. However, "beginner" may hold some back. I wouldn't consider any DSLR a "beginner setup." All of these cameras come with quite a "learning curve," over a point and shoot.
Learn all the settings, what each does, what the terms all mean, and how they effect the photograph.
This is a great forum, to learn all of these things at!!