Yes, there are real Wiccan churches. Some call themselves churches while others may call themselves a coven, circle, temple or grove. Depends on tradition.
One popular church is the Unitarian Universalist church. They are well known for allowing Wiccans and Pagans to meet at them and generally know a few people you could talk to about learning more.
www.witchvox.com is my favorite place to find people, groups and witch shops locally. Most groups, like a coven or circle, will have someone who teaches the religion sometimes one on one or other times in a group class. If you live near a metaphysical or new age store (aka a witch shop) they might give classes or workshops that you can attend.
There is also a few websites that have lesson set ups. One is www.witchschool.com which is by the Correllian Wiccan tradition. They have temples in many places but also do online studies since they aren't everywhere. Their lesson plans are also available in book form.
However, if you are wanting in person lessons, expect no one to teach a minor without parent permission. Without written permission from a parent or guardian, it is illegal. It isn't that they don't want to teach it...they just don't want to get sued for doing it. So many teachers and group have an age requirement of 18 years old.