how do i become an evil witch.

Merry Meet Seeker,
I am not sure why you are asking this question. No one, in their right mind would want to be an Evil Witch or an Evil person. Witches are the most spiritual and benevolent people who believe in doing good and nothing else. The words “Evil Witch” were coined during the middle ages when the natural religion of witchcraft was too threatening to the other religions.
Witches were so powerful and spiritual (as they are today) that the new religions believed that they were being threatened. In their frenzy to gather “the flock”, they didn’t care who they shot down. So they made stories about witches being evil and black cats being evil and so on. Ignorance of course breeds more ignorance, indeed.
However, the natural religions continued to respect the land, the people and all of Nature since that is our world and we need to take care of it. Wicca and other peaceful religions know from the heart that what we believe and how we deal with others is what makes a good human. Wicca and other peaceful religions such as Hinduism knew that the essence of the Creator is in all of us regardless of what religion we follow. Unlike some of the other religions, Wicca and other Nature based religions knew that the more peaceful we are, the better our lives are.
To take care of our planet and to sustain the current environment for humans and animals, we have to be good witches. Being a bad witch is a dangerous idea. What we do is returned three fold to us; so why would anybody wish to hurt another living thing?
I hope you understand that being a good witch is the best way to live a full and happy life. Do you best for the world and you will be happy always.
Brightest Blessings
Rose.