Hi there, Shanz - and welcome to HNZ!
(To receive a fuller welcome, I would encourage you to
introduce yourself to our community 
)
As to your recent discovery of what beliefs you have/line up with yours well - why not share those thoughts in
this discussion topic where a lot of people have explained what they believe about religion/the universe/their place in it.
As to the religion of the characters in Harry Potter: it's difficult to tell.
To be blunt, I think J.K. Rowling skirts the issue of religion. For instance, many characters are muggleborn, raised by muggles, etc. They surely have some muggle belief system (atheism, agnosticism, or a religion - it matters not). Some major recognized religions, however, condemn witchcraft as sin (Christianity, for one). It is likely that many of those witches/wizards were Christians, or are, when they are invited to Hogwarts - how do they reconcile their faith and magic? I can't say.
Moreover, we know that Christmas is celebrated by the wizarding world. Hogwarts decorates for Christmas, the pureblood Weasley family celebrates it, and many other examples of celebrations are given. If they were truly wiccan in belief - they would celebrate Yule (and not just have a 'Yule Ball' which is only had once every four years at a different school every time.
) I figure 'Yule Ball' is like our 'Yule Log' - it has the word 'Yule' in it but has no correlation to the celebration of 'Yule'.
So there are a lot of things to consider, and questions raised.
Given that JKR undoubtedly had religious (dare I suggest
Christian) undertones in her works, I would not jump on the 'Wizards are wiccans!" bandwagon. I would be inclined to believe, as I said, that JKR never specifically addresses character's religion(s) on purpose.
