Magick is a term that indicates the science and art of the occult. It is also considered a religion, preferably called a lifestyle among those who follow it's terms(Warlocks, Witches, Wiccans, Pagans...). It's based on the belief of what you see and what you experience. It is a science that you built by yourself, making you a truth seeker. Nature is the key to everything. You combine the four elements of nature(earth, air, fire, and water) with spirit to make goodwill:
"An ye harm none do as ye will"-Wiccan rede which expresses most of the Wiccan morality. It basically means to not do to others what you don't want them to do to you.
Magick is usually mistaken with magic(that is actually just an illusion that a magician creates). They both involve supernatural feats, but one is actually something true that not everyone is able to do; the other one is just appearing to be performing these supernatural feats.
There are a lot of different types of witches, but the main ones are red, white, green, and black witches. They are separated base on their rituals, beliefs, and purpose. Wiccans are part of the witch community, they are considered modern witches. Witches include tarot readers, astrologists, and everything that has to do with divination.
The first witch is said to be Lilith, according to the myths and ancient stories told by satanic witches. She was the first wife of Adam but refused to obey him unquestionably. When Lucifer fell on earth she was the first one to serve him as Satan. The King of Lies promised her that she would be the queen of hell, but she ended up being the mother of demons. Satanic witches are considered black witches that involve their magick with dark entities.
It is common among people to see witches as something evil. These thoughts come from fear. Fear of the supernatural. Fear of the supernatural. Fear of things that cannot be controlled because of the greatness of the power it has. Fear of the unknown. Fear of the different. This same fear killed, executed, strangled, hanged, tortured, and burned to death many innocent witches. This doesn't mean that all witches are good, as there are good and bad people there are good and bad witches.
Witches can rite by themselves or also join a coven. A coven is a group of witches who work and rite together using the empowerment of the sum of its members. Both males and females can be members of it. Traditionally a coven has 13 members but many have any number of members.