What are the requirements to become an ambassador?

Hey, I applied to be an ambassador and was wondering what are the requirements needed to be able to become one?
And do I become a Full Ambassador if I invited 15+ people already before even becoming a Lite Ambassador or do I need to invite 5 more people after becoming one?
My VerseTag is $aurape2 (same as my forum name)

You have it in the app and the web.
And no, doesn’t count