I would also say that in addition to just using SNGPT it also might be good to work through the math by hand a few times so you understand what it's doing. I learned from a thread where I asked/learned about pokerstove and eV vs $EV (ICM). I think knowing the math and the theory behind both also helps to use in situations where it might not be as simple as push/fold/call-push.

Here's that thread. But I'm guessing there might be a much more user-friendly, comprehensive tutorial out there?