My soul has left my body more than once. So I know there is a soul.
As far as the afterlife, this is the closest I've gotten:
Once I had a lucid dream and I asked God to show me the afterlife/ other side. I thought I would feel my soul pulled out of my body, but instead I felt it pulled in. Then I saw the back of my eyes, then I saw my bloodstream, then I saw the inside of one of my cells, and then it was like I was being pushed through a pane of glass and I saw... the world looking exactly as it does now but calmer and cleaner.
You could read:
We Don't Die by George Anderson
Soul Mates by Jess Stearn