Adding store redirect after someone clicks Add To Cart button

Site URL: https://www.coolangattaestate.com.au/shop

My client site is a winery. How can we have all the wines on a single display product page with dropdown selectors  so people can in one single view see ALL wine varietals, simply click quantity and add to store then click through to checkout when they are done. Like this page (built in Squarespace also)

https://www.8bellswinery.com/shop

Can anyone tell me how I can make this happen? I can't figure it out and am hoping it is not template specific. 

Failing the above, how can I add code to the 'Add To Cart' button in order to redirect them back to the main store so they can select other products?

My client is a winery and we want people to be able to a) select a wine varietal b) add selected variant/quantity to cart then automatically be redirected back to the main product page should they wish to select other wines. As it is I've had to write clunky instructions inside each product directing the customer to scroll up and click 'SHOP or 'NEXT/PREVIOUS/

Do you have a mock-up of what you're looking for? The site/page you've quoted shows a page with no products when I view it: