How to redirect WooCommerce “add to cart” button to the checkout page without plugin?

These are the simple settings in WooCommerce to skip the cart page after Adding a product to the basket:

1 – From admin dashboard go to WooCommerce > Settings > Products > General >next to “Add to cart behavior” make sure the option “Redirect to the cart page after successful addition” is checked.

2 – Moving to WooCommerce > Settings > Advanced > remove the checkout page ID from the checkout field and add the checkout page ID into the add to cart field

3 – To rename the button add this code snippet somewhere in the functions of your theme: 

add_filter( 'woocommerce_product_single_add_to_cart_text', 'custom_cart_btn_text' );

add_filter( 'woocommerce_product_add_to_cart_text', 'custom_cart_btn_text' );

function custom_cart_btn_text() {
	
	return __( 'Buy Now!', 'woocommerce' );
}