how do I put limits on the amount of orders i accept?

Please provide more details about what you are trying to achieve.

Jotform provides  powerful features to apply conditional Login and Calculation before a form is submitted

https://www.jotform.com/help/57-Smart-Forms-Using-Conditional-Logic

https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget

More details from your side will help us provide you a solution specific to your need.