First of all.. you don't need to sell your soul to anybody to learn about the paranormal or wicca. We are very soulful people here.
Christianitysometimes exaggerates things and I say this as a Christian.
Spells are not "evil". In magick there is no good or bad, only the intent of the one who practices.And if you send negativity out, expect some back one way or another.
If you are eager to explore, read some articles here and talk to some knowledgeable people. Then if you believe this path if right for you, there will be no doubts in the way.