Emails sent via your contact form will go to the email address connected to the contact widget. By default, no email address is associated. You will have to add the email first before form submissions will be sent to you. .
You can update the email within the contact form widget at any time. Within the editor, click on the form widget you're using, and select Submissions in the pop-up. From here, click on Submission Recipients and enter the desired email you wish to use.
Note: If you have more than one form widget in your editor, you will need to update the email on each if you want them to go to a different email address.