Redirect Checkout Button To Home Page and get all the values of the listed product in email.

Site URL: https://nicholls-and-co.squarespace.com/cart

I am just want to redirect the customer from checkout button to home page(before proceding the payment) and need the product added in cart by customer  to email address.

https://nicholls-and-co.squarespace.com/shop/p/pink-artificial-flowers-enafy-3f857-z2lgn-4ngg9-9le97-r4fs4-mb2j2-at4gm-sd379-rpjg6

Password: 123456

You want, replace Add to Cart with a button > Click button >> Show lightbox >> Customers can enter info >> Info will send to your email?