I designed my form and now I want to get it on my website but I don't know how.

This guide should help you embed the form to your website.

https://www.jotform.com/help/67-Which-Form-Embed-Code-Should-I-Use

But one more thing, your forms are created to collect a credit card information. Please note that we do not allow this. We consider this as phishing which is against our Terms of Use (http://www.jotform.com/terms/). Please edit the form to avoid suspension. 

If you want to collect a payment at later date, you can use our Payment Integration such as Paypal and enable the authorization only mode:

https://www.jotform.com/help/292-How-to-Enable-Payment-Authorization