Thank you for joining our group. Let's get you started.

You should checked your email inbox for instructions on how to get started. but

before you do that, schedule your call with your onboarding account rep. 

(?? I would recommend a video welcoming them aboard with a quick overview of what to expect next. Set the expectations and tell them what they will need to do on the onboarding call. Some people won't go through it, but it will prepare the ones that review it for the call.)

(?? Add copy here that covers what is covered in the video in written form.)