Anyone guide me about website development

Hi everyone,
I have physical business of xl bully puppies. I have so many puppies. And now i want sale them online. Can anyone guide me that how i can create my business means on which platform i can build my puppies site like by using html, css or wordpress etc
I have found a pup's site on interent. And i liked this website so much https://kingbuiltbullies.com/xl-bully-puppies-for-sale/. Can anyone help/guide me that on which platform this website is created????
All suggestions are most welcomed.
Thanks!

This site is build on PHP.
Check site full info from here https://w3techs.com/sites/info/kingbuiltbullies.com
If your budget is good. You can do custom development using nopCommerce

jennifervaldez wrote:

seems it's a WordPress theme by oceanwp. As suggested, you can also choose nopcommerce as your platform & can also add custom theme design with the help of developer.