How to redirect the user to the Yukassa page with a choice of payment method for the goods?

Question

WordPress

Good afternoon! There is a site on Wordpress, on which it became necessary to add a form with the ability to specify the order number and the amount of the goods and the pay button. when you click on the button, it is not possible to redirect to the Yukassa page with the order number from the form and the amount that the user specified. How to make a redirect to Yukassa on a regular page? How to make the user enter payment data there, and not in the basket and not using the widget?