a) I don't know many of the specific religions of Paganism, so i couldn't tell you which one.
b) I'm not necessarily looking for a specific school because i dont know anything about the individual forms of energy work
c) i have no clue what Witchvox is
Let's back up a couple of steps, because it sounds like we'd need more information to help you find what you're looking for.
Based on your previous experiences, where have you tried to learn already? Are there any books, websites, etc. that have shaped your interest in energy work? Do you know if there are specific skills you'd like to learn, and if so, any terms you've heard for them would be very helpful. Any of this information would be very helpful.
As Brina points out, there is no single Pagan religion: Pagan is a term for a bunch of different religions which have some similarities, but also many differences. Reading the Pagan Primer over in the left hand sidebar (
http://www.ecauldron.net/newpagan.php) is a good place to start.
Witchvox is an international Pagan networking site found at
http://witchvox.com : while I don't live in Seattle, I know there are a number of groups in the area, and that several of them teach introductory classes that might cover some of the material you're interested in. You should be aware that more involved energy work is often taught within a more specific context, like a particular kind of magical practice, Pagan religion, or other similar group - in large part because a lot of how you go about it depends on what you want to *do* with it, and different paths will focus on different techniques.
Does that give you some better places to start working on the next set of questions that might help you find what you're looking for?
(Oh: about your back. There are many reasons someone's back might be painful - generally, figuring out what's going on is easiest if there's someone physically able to watch you, talk to you about what's going on, etc, especially if you think it's being affected by other people's actions, or by your own energy work.)