How to make a payment for goods on the landing page?

Question

Payment systems

Good day to all. Here on the LP I have a button to request a call. And how to make the button "Buy goods" correctly with its subsequent payment through electronic money? Or that after consulting with the client, send him without problems to the payment page? In what form should I make a payment on this page, attach a payment form on the landing itself or transfer it to some other service?
Explain in more detail please.