Witches are real: They're people who practice magick. Magick, which witches like to spell with a "k" to differentiate it from stage magic, is real, too. The practice of magick is about raising and directing energy to fulfill your intentions, and if you haven't noticed, witchcraft is in vogue.
A witch is aware of their own power and puts that power into action. Whether you are male, nonbinary, trans, gender-nonconforming, or anything else, you can be a witch.
In real life, you can be a witch and look just like yourself, no eating children required. So how do you know if you're a witch? If you feel an urge to exert your will and get what you want, you qualify. A witch is simply someone who is aware of their own power and puts that power into action. If that's you then congratulations, you're a witch.
A coven is a group of witches that meets regularly to perform magick and rituals. A coven can be traditional, with 13 members and a highly organized initiation process, or it can be more laid-back. As witchcraft has become mainstream, covens have become more casual. Some people enjoy the responsibility and framework of performing magick with a structured group, while other people perform better as solo practitioners. By all means, form a coven if it's appealing to you. But if magick is something highly personal that you do alone, that works, too.
Like many other communities, the occult world has problematic members who insist that to qualify as a witch, you have to come from a magical bloodline.
Some people do have witches in their families, and when you're looking for spirits to work with, magickal ancestors are a powerful choice — but so are any ancestors. If you come from a non-magical family, aren't close with your family, or have severed ties with them out of necessity, that has nothing to do with whether or not you can be a witch.
As for hexes, those cast to inflict misfortune on others, are indeed real. Speaking of hexes, you've probably heard about "black magick" and "white magick." Some people use these terms, but they probably shouldn't. To start, they have racist undertones. Generally speaking, magick itself isn't simply "good" or "evil": It's a tool. And as with all tools, the intent lies with the caster.
ii-wy em Hotep - Patrick Gaffiero