I want a form to be confirmed (on a new page) before it is saved to the database.

Have your first page submit to the confirm page by setting the Form action to the confirm page. That first page doesn't need any server behaviors.

On the second page use the bindings panel to add the form from the first page so you can easily display the submitted values.

Then add hidden form elements and set their values from the form bindings as well so that they will be re-submitted on the confirm page and can be inserted easily from there.

Just make sure the form button names are different on each page so you can identify which page is being submitted in your insert server behavior and use the button press trigger for the second form when doing the insert.