Hello.
I am a developer with experience in using HTML, PHP, CSS, JQuery, Codeigniter, Bootstrap ,etc.
I can help you to create the order form.
I think we can use paypal express check out for the payment.
But, what do you mean that you need to send the total order amount to a google conversion code?
And, is this core php site? or wordpress?
Please let me know the more details.
So, could we discuss it now?
Thank you