It is true that Amazon can be a bit pricey, but it is within the TOP 20 of the most visited websites globally, and the number 1 online selling website. You can also check for a specific country for a targeted traffic.
It is wise to set-up an Amazon shop and start your own online biz at the same time. Optimizing a new website with competitive terms may take 6 months - 1 year before it pays off (maybe even more.) Placing your website URL to your Amazon page will help you in terms of branding, familiarizing the traffic of your own site, and redirecting them to your shop.
It can start expensive but may benefit you in the long run. When you get enough traffic to your site, you can end your contract with Amazon.