Congratulations. The first step is underway.
Yes, INZ can knock some people back if they've overclaimed on their points or some other information doesn't check out. Let's hope that's not the case for you.
Here's a
diagram of the whole process . Once INZ has checked out your info and all is well they should send you an ITA pack. This could take some time, so don't panic if it doesn't arrive in the next week or so. I'm sure others will have a better idea of the timings.