Hi there.
You will need to set up on the amber and flint test nets, then create a post to introduce yourself and express your interest. Once accepted, and you’ve validated for 2 weeks you apply to the program by emailing
chain@centrifuge.io
I’m the same. I’ve set up the node which was straight forward. Haven’t looked at validating yet.
If anyone has already been through this process and I’ve given the wrong info please feel free to chip in