You can connect GetCourse with your website on a third-party service. You need to use a widget with a form. Appearance of the widget can be adjusted:
Installation of the widget onto a website allows collecting of contacts from your website and putting them to GetCourse. Then you are able to send mailings to all these contacts right from GetCourse as well as to hold orders and to accept payments in GetCourse. Access to materials will be granted automatically.
Installation itself is not difficult. You need to copy a widget code and insert it to a needed place on a landing.