There are a ton of facebook groups out there for people interested in learning witchcraft. Finding local groups may be difficult as they are usually invite only.
Witchcraft is such a broad term that many people people of different belief systems find themselves under that umbrella so it may take some thinking on your part to figure out what you believe and what you are interested in learning about. If a group doesn't resonate with you then find something else.
Scott Cunningham has published several books about Wicca. http://amzn.to/2s6uLGc (Affiliate link)
Raymond Buckland has some good books as well. http://amzn.to/2tqebEY (Affiliate link)