"I haven't explained very much of this because there is quite a bit to explain. You don't except to drink an ocean in 5 minutes, do you? You have to start somewhere, and work from there. That's why I'm asking you what you want to be. So I can find a place for you to start, and set you up with people who can explain things better than I can.
And as for finding your soul, why would it be as easy as 'detect soul?' Magic isn't like wishing. It's complicated, and difficult. And I'd be very, very surprised if your souls where even in this world. So you wouldn't just be searching for a soul, you'd be searching for a soul across every plane in existence. And, might I ask, what do you plan on doing if you do find your souls? Ask for them back or something?"