Most folks will not formally teach anyone under 18, there is too much possibility of “contributing to the delinquency of a minor” or other problems if parents or community members get cranky. It’s probably a different story if you are living independently from your parents. In any case, it’s not fair to leave folks completely adrift, so I’ve gathered some general info and advice which might help you.
I suggest you read at least two of the following books. These are good introductions to Wicca and reading more than one will give you more than one perspective on what it’s all about.