Redesign Shopping Cart feature to make a purchase order rather than asking for payment at checkout

I currently have a wixsite that I am trying to modify to fit the needs of my work. I am a fulltime Cheer coach and mom, but have a side hustle of making cheer shirts for the gym I work at. I am trying to create an online "store/space" where my customers can get online, see my catalog of designs, Add what they would like to purchase into a cart and fill out a brief bit of information. However, once they are done with name, email, phone number, and method of payment; I would like there to be a Submit button, where once it is submitted it will send me an email/purchase order of what they are wanting. Most all of my business is local and pay with cash upon pickup therefore I really don't need a ecommerce store, I just want a place to refer customers to so they can place the order on their time.