How to replace the button "Add to the graph" of WooCommerce by the same, only in version AJAX?

so i'm doing this shop page for my brother and i have encountered a problem.
I have this main store page here: https://pramogama.lt/kavine/

There are many products with variables. I want people to be able to add products from this page to the cart without reloading. How can I do that?

Also ask for all the information you need, I just do not know what to give.

Thank you!