Obviously if you are building and eCommerce site you need more than just a bootstrap theme. Bootstrap is a front end css framework, so you would need to consider what platform or css you are going to use. Wordpress & WooCommerce is a great place to get started as both are free and easily extendable. Both offer ease of use and are highly customisable.
Usually I make some blogs using this template monster bootstrap woocommerce https://www.templatemonster.com/bootstrap-woocommerce-themes/ for instance and should say it worked pretty well for me and my clients. I think I can help you with building such a website if you wish. Simply give it a try. Good luck
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