The good news is that if you don’t want to use WooCommerce you don’t have to - simply don’t install the WordPress plugin. Your theme should still work just fine without it.
If you would prefer to use Shopify instead of WooCommerce, you’ll have to use the Shopify Buy Button with WordPress. If you want to setup your website this way you’ll need to signup for a Shopify account and add all of your products there. Then you’ll have to separately setup your WordPress website, install your WordPress theme and then insert buy buttons for your Shopify items.
The only bad news is that your WordPress theme probably doesn’t include design options for Shopify buy buttons since the theme was designed to work with WooCommerce.To style them you’ll probably have to use custom CSS (if you don’t know how to do this we recommend finding a developer to help on Envato Studio).