You can learn a lot from this site, if you can separate the intelligent from the rubbish!
But a lot depends on what you wish to learn. Wicca,or witchcraft?
Wicca is a religion that has aspects of witchcraft in its rituals and ceremonies.Witchcraft itself, is not a religion. So, witchcraft (or magic if you like) can be, and is, practised by followers of many religions. For instance, there are many Christians who practise witchcraft; although I doubt that they would refer to themselves as "witches"! They remain Christians.
Blessings from a very old witch, who is not Wiccan!