I agree about using WooCommerce - but you also might consider going on a bigger platform if you have a lot of inventory. WooCommerce has a plugin that allows you to sell items that are on Amazon through your website. If you are selling your own inventory you can ship to Amazon FBA and also advertise your niche product on your store. If you do not want to sell your own inventory you can also sign up to be an affiliate on Amazon - then link your WooCommerce store to the affiliate links, earning additional money on products that you are not responsible for shipping. There are a variety of strategies depending on your market. Let me know if you need more details, happy to help!