Please refer to our Advice for New Witches page to help you get started.
As for escaping the Christian programming, that is much easier said then done. It takes a lot of time and patience to undo all the negative programming we've had for years and I'm not just talking about Christian programming either.
Once you have formed a bond with the God and Goddess, which takes time and practice, you'll find the negative programming will start to ease away on its own.
If you find that you are having difficulty studying or practicing on your own, then find a group in your local area.
Blessed be and namaste!