How can I get notified when someone fills my form?

You need to create an email notifications to be able to receive notifications. Please check this guide: https://www.jotform.com/help/25-Setting-Up-Email-Notifications.

You can also send to multiple recipients, here's a guide: https://www.jotform.com/help/39-Send-Notifications-to-Multiple-Recipients

Hope that helps. If you need further help, please let us know. Thank you.