Is there anyone that is a witch wiccan coven etc that can be interviewed?

In most areas of the country there are Pagans of various paths who are "out of the broom closet." A bit of basic investigation in your area will most likely get you a few names. Try looking at bulletin boards in your local New Age, or Metaphysical book store and shops. Or check you local college or university, they often have notice boards of various groups for students.
Once you have a contact name, decide what you want to interview the person about. Is this for a paper or a project you are doing, or is this for your own information? The answers to these questions will greatly effect your chances of getting your interview.
Once you have a subject to interview, be polite and courteous in your approach and be prepared to accept some rules from your interviewee. Be respectful of their beliefs and requests, even if you do not believe, try to remember that they do.
In some cases you may be invited to join the group for an evening as an observer. In which case know in advance what you can and can not do. Are you allowed to take photos, or use peoples names? Once again I stress be polite, it is unprofessional to ridicule or make light of what you do not understand.
If however you are unsuccessful in finding some one in your area, you may want to try to get in touch with the Pagan Federation and do a "phone" interview. If that is all you can get, at least you will be talking to people that "know".