which plugin&theme?

Hi everyone! i am very new at wordpress and i wanna create online store website to sell products but as i told iam very new and don’t know which theme and plugin will be good. I have searched about WooCommerce and i guess it is good. Especially i need registration system for membership and security layer and to be able accept payment online. If i buy a wptheme which compatible with WooCommerce, i will be able to sell products online in security?

These would all be the right type of theme https://themeforest.net/category/wordpress/ecommerce

Bear in mind that to ensure security etc. Will mean investing in the right hosting and security addons beyond the theme

thank you