Firstly, I applaud that you have a curiosity for spirituality. It shows your mind is full of questions, and you're willing to look. That's potential for a great person.
But you need to rid yourself of thise false idea of religon. Religon is out to get us. Guys aren't sitting around at church rubbing thier hands together, scheming some way for us to be afraid and resenting of them. If that were the case, the church would not have withstood the test of time..
I'm going to be frank with you, evil exsists. Evil is a very large field, but it is weak, and it can easily be countered. People are afraid of "Satanists" or "black magick" and these things do not exsist. Any "Satanist" is just a pathetic little man who feels inaddiquite and wants to use the evil to make himself feel important. Because we asscosiate the devil with fear, manipulation, and raw power.. Clearly someone who doesn't believe they have any sortof power would need seek the devil..
Evil is a peversion of good, the abscence of it's teachings and discipline. Just as darkness lacks any sortof light. When you feel bad, you feel a sense of lacking don't you? A sense of emptyness? THAT's evil, the lack thereoff.. That's why I believe athiesm and agonosticsm is a far more dangerous mindset then "Satanism". Because they live thier lies without purpose and the will to question and aswer. They lack the spiritual drive and are empty inside.
But about your question, the soul. What is the soul? The soul is what you make of it. It's your's dude, your energy, your persona, your emotions, your life. It's up to you what a soul is or is not. Just don't make the mistake of thinking it's not. You're too "good" for that.