Also, I would like to learn the Craft. What books do you recommend? Thanks.
As for your question about learning the Craft, please see our Advice for New Witches Page. It has good recommendations and was designed for people like you.
A nice bath with lavender, sage, and epsom salt can do a lot for removing and purging negative energy. You can also drink lavender tea to help purge negative energy internally. Unfortunately, there's no way to do this permanently because life attracts negative energy. However, whenever you feel the negative energy starting to build back up, simply have a cup of tea and a hot bath.