Before working with magic or spell casting there are some key things you need to know:
*Belief in yourself and your abilities
*Circle Casting and Releasing
*Correspondences (colors, days, lunar phases, etc)
You can find information on these in Newbie Central, located on the Home tab.
NOTE: Please keep in mind that depending on who you talk to the basics can and often do differ. The above list are the basics that I studied when I first started practicing and are what I teach my students. You can add to this list or take subjects from it depending on your interest or what you feel you need or don't need to learn. However, I suggest studying all of them because you may very well need to know them in the future.
Also, technically since magic is energy it doesn't have a color. The intent behind the spells you cast or the rituals you preform determine if the outcome will be positive or negative.
I would suggest that you look through the covens, located in the Groups tab, and see which one offers lesson or classes that would interest you.