Heya @MrsKM and welcome to the Community.
I moved your post to an existing thread that goes over where to find the toggle to make sure you have the ability to accept orders.
Also make sure that you have fulfillment options set up for each item as well as making sure you have a location for pickup in > Settings > Pickup & Delivery.
For anyone else experiencing an issue where it states their site is not secure, that's a different issue. For that, you'd want to go to Website > General Settings, use the unpublish option at the bottom, then go back to the website editor and publish the site. That should trigger the system to issue a new SSL certificate as long as the domain is configured correctly.
Ashley C
Community Moderator, Square
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