That's it? 4 posts and you're throwing in the towel?
No explanation as to what it was that changed your mind, nothing?
A walk with Christ can be a long road sometimes, sometimes you have to give up things, sometimes they may be personal beliefs that contradict the bible, sometimes it may be literally giving something up, who knows.
But you're only a few steps in and you've decided to give up? If you don't mind me asking, why? You can't go from agnostic to atheist overnight like that, you're denying that you ever thought God existed for some perceived gain, but it doesn't work like that.