Hi there @Lorraine1!
Sorry you have been having issues editing your website, and finding resources. Please see the thread below.
You should be able to navigate to your Square Online website directly from your Square Dashboard. You'll want to locate the Online button - it looks like this:
Once you've clicked here, you'll be popped out into a new window for your Square Online overview page. In the top right-hand corner of this page, you'll notice a button that says Edit site (or Website > Edit Site via the left-hand menu).
Clicking this button will take you over to your site editor.
I hope this is what you are looking for, if not let me know!
