Im not sure what you mean by opinions. We believe that magick is real, I think that all of us here do. However, the magick that we believe is subtle. Its like asking the universe to do something for you- just push something a little in your favor. I don't necessarily believe that "black" and "white" are appropriate categories to separate magick into, but they are easy and simple ways to put things in order to understand them in the beginning.
Before you begin you must know what you may or may not be getting into. You can read the FAQs section (find the tab at the top of your page), you can read the articles, you can even look up some forum posts if you would want to in order to understand all that goes on here. But do ask yourself why you are here. Do you feel a pull toward magick or Wicca? Or do you feel the need to levitate in order to impress someone? If its the latter, you may be disappointed.