If you don't already have one, use some of these suggested resources to start your work of crafting one. Depending on your jurisdiction and the location of your website visitors, specific requirements will apply. Viewing the privacy policies of groups you admire is another good place to start.
Writing a GDPR-compliant privacy notice
You can temporarily unpublish this page until you have your policy in place, although that may risk your noncompliance with applicable legislation.