Membership to a create page on my website

Hello, I am trying to add the membership drip protected content to a page already created. How do I go about adding a page to my membership? I have another plugin that I want to protect which is on a page I created. Wanting to know how can I get his to work? There is a course I have created I want to add that course into my membership drip content section as well. How do I go about doing that too? Thank you so much for your time! I really love the plugin but I can't use them like I imagined to.