For paid courses, I'd like to be able to link to the sales page when people press the “Register for the course” button.
Paid courses
Ricardo Da Silva you can configure a Custom Lock Screen for your Private Course and then you can use a Button with your own link
Ref: link
Ronald if you sell your course via woo then you provide the access to the course with FluentCRM (tag) and give the user the course link (via email):
domain.com/portal/course/courseName/lessons
You could also try to send a Chat message with the course link to the user with FluentCRM too if needed.