CoursePress and payment gateway

We recently updated to CoursePress 2 and things got pretty wonky. I'm just a project manager, doing some investigating for our developer about how to resolve some issues. We're currently working on setting up a course and used to use authorize.net for a payment gateway. Now it looks like we have to use marketplace with Coursepress 2. Is that true? Is there a way we can reconnect with authorize.net? If not, can you provide support on configuring marketplace?
I'm attaching screenshots to demonstrate other issues we're having. This is the link to the course we're setting up: https://jabberlogic.com/courses/more-than-a-logo-build-your-brand-in-three-days/