How to add client log in and enable comments

Hello my web page is https://www.northcountyartglass.com, and I was wondering how I can add a few things. First as a store I would like to create a client registration database that is secure. I was wondering if when I buy the full version of Cart66 this will be enabled as part of the shopping cart feature. Also I would like to add the ability for registered users to comment on the products they purchased, on the product page itself. I would also like to add the ability for people to like the products on the individual product pages via social media. I have set up almost 400 items in cart66 with pages for each, and have been told woocommerce is better, but feel it is way too much work to convert. If you could take a look at my website and let me know what you think it would be greatly appreciated. This is my first wordpress site and I’m kinda learning as I go, Thanks.