Is a Wand Necessary?

I am wishing to start learning about magick, particularly after I had this strange and sudden craving for a wand. But I wish a few tips first; Number one: Is it actually necessary to have a wand? Are there other types of Magick directing instruments? Number two: Should a wand be found and hand made or bought at a store? and, finally, number three: Are there any particular preparations and precautions that need to be implemented before trying to use a wand in practise?