Integrating Product Pages. How Would You Do It?

I’m not looking for a plugin — I’m going to build the functionality myself. Just looking for advice —

How would you use wordpress to show actual product pages?

If possible, I’d like to avoid altering the database, and simply use existing wordpress functions. (But if I have to, I will).

Here is an example of what I will be integrating into my new wordpress site:

https://www.clipartillustration.com/clip-art-illustration-of-server-technican-orange-man-holding-up-mother-board.php

I thought perhaps making a special post template would be sufficient, and somehow keeping the product tags separate from the blog site tags.