The real reason for this is that there are no predefined paths to follow and no authorities to respect: everyone can find their own path and self-initiate as a practitioner.
There is, however, an upside to the coin: the risk is to get lost among improvised little books and thus acquire scattered notions devoid of any organicity, therefore useless in order to successfully channel the magical power of the rituals.
Here is a preview of what you will learn in this wicca guide for beginners
Wicca has had its ups and downs in the magical neighborhood, flourishing on appeal shortly after its inception, and today in full force as magick and other nature-centered practices return to popular culture. Wicca draws heavily from these pre-christian cultures and their practices, while utilizing the 20th century lens of companionship and initiations, similar to the hierarchical societies of the victorian era.