There are many, many Christians and followers of other religions who today are accepting of faiths other than their own, including witchcraft - but much of the ignorance remains. However, in this century, the US Supreme Court has recognized witchcraft as a valid religion. Wiccan churches are gaining tax-exempt status just like the Christian churches and witches are finally moving to the point where they can once again practice without fear. Wiccans have no clergy who claim to speak for the Gods. It is not unheard of for a witch 3 to go his or her entire life without ever meeting another.
Most witches teach themselves to work magick.
Therefore the 'Craft' is different for everyone. Some witches practice alone, while some seek out a coven to practice with others. A coven is group of witches who practice together, traditionally a group of seven or 13, but these days it is sometimes hard to find even seven in some places. Wiccans worship many deities at once, but the one deity that all Wiccans recognize is the Goddess. There is no exact origin of her existence.