Yes, I've become a witch and it was very easy with an old ancient recipe. First you bathe in ice cold water, for about 20 minutes, it gets out all the human spirits. Then you need to wash your hair with mustard, get rid of that nasty mortal stench. After this get a dragon fly, grass hopper, fry them and eat them, giving you the special powers you need. Good luck.
"White witches" are members of the pagan religion, Wicca. If you're interested in learning more, get yourself a book on Wicca that explains what it's REALLY about, not all the misconceptions of what many people believe it is.
Someone can not just BE a witch. It takes time and practice to become one with yourself. Witchcraft, which it more commonly known as the Wiccan religion, is all about the earth and the elements of the earth. I'd advise reading non fiction books on the subject. I had just read some great book that about the religion but unfortunately they are fiction. but the Wiccan information is completely true and accurate. I would recommend reading those if you want a story to go along with the lesson. they are called: SWEEP. they are quite big books but very easy reads (larger print). there is about five books in the series. by author is Cate Tiernan. I'm sure you can buy them at any book store.
Keep in mind too that Wicca and Witchcraft are two separate things - one, while based on the practice of Witchcraft, is the priesthood of a specific God and Goddess, the other is something that can be practiced by almost anyone of any religion.