Hello and welcome to magick! You need first to learn the basics. This will teach you how and why magick works. Once you get the gist of it, you will say, :Oh yeah!" lol
Seriously though, start at the beginning. Basics, meditation, energy work and grounding. Another site you might be interested in is about.com, which is very easy to read. Put Wicca basics in their search bar and start learning. BTW, you do not need to be Wiccan to do magick. May you find what you seek.