Thank you for your post.
When you get to the Database screen, and before you tap "Email", what appears on the screen? Under "Name", it should show the name of the database file followed by "Copy". If this works, try first tapping "Save" and see if the file is saved. If this works but "Email" does not, can you let me know if Mail is at least launching with a New Message? Just to make sure, Mail is configured for the iPad?