Change a shopify "add to cart" button into a "Buy Now" redirect button.

Hi, I have a shopify store newly created. I also have the template for my store. I basically want to setup an affiliate website using my store. So someone need to edit my template and change my "add to cart" button into "Buy now" and when i click on the button it should redirect to another page. I will put the redirecting link using at some available field. Also need to remove the "Cart" function from my store. Due to some card issue i'm able to award the project tomorrow morning only. But i'm ready to finalize the project and available to discuss. Please only bid if you are good in shopify. Thank you, Karthik