Wicca isn't spellwork, it's a religion which happens to incorporate magical practice into the religion itself. Wicca is not something you are born being, you have to actively decide you want to convert to the Wiccan religion. You become a Wiccan by studying the religion, practicing the religion, and dedicating yourself to the Gods of Wicca.
You don't have to be Wiccan in order to practice magic. Anyone of any religion can do that. So don't worry about whether you are Wiccan or not unless you decide that you want to join the religion