When a possible customer fills out my form when does this information go to my Jot form and get sent to me?

The information will be stored on your form submissions page. Here's how to view your form submissions How to View Submissions.

Aside from that, you will also receive email notifications containing the user's information. Here's how to view/change the recipient email of your form submission https://www.jotform.com/help/41-how-to-change-the-email-address-used-for-notification-email?.