How will my team qualify for Bgmi series after registration?

If you have registered your team successfully then you need to wait to get confirmation from BGMI team or Krafton. Although once you have been registered successfully you will get option enabled to join the tournament at the start of tournament. You don’t need to do anything to qualify for BGMI Series after registration.

Can we change player after Bgmi India series registration?

Once you have submitted BGMI India Series Registration form then you can not modify it again.