I can't add e-commerce to my theme

Hi everyone,

I bought 1 theme as link here Residence Real Estate WordPress Theme by WpEstate | ThemeForest

can anyone help me, is it this theme is not for e-commerce at the 1st place, or can upgrade to add e-commerce

Thanks in advance

in the theme details page there author mentioned about:
WooCommerce Support for Payments

You can check details page. Also you can check theme documentation.
The best thing you can ask this query directly to the theme author by contacting them.