Indeed, the easiest is to use a standard e-commerce platform because they have lots of templates, apps/plugins and hosting is included: Shopify, Wix, SquareSpace are the main players and priced more or less similar.
You can also go for a free Wordpress, the software is free but you will need to sort your own hosting and set it up.
I would take advantage of the free trial they offer and check which one you like best for ease of use/result.
I have also found Pixpa, built especially to be used as an artist's portfolio, they have a cheap version without payment solution
https://www.pixpa.com/
Create the website, buy a domain name (I would avoid GoDaddy because it is very difficult to get out of their renewal system), connect, and you're good to go.
Never tried SquareSpace, done lots with WordPress, but Shopify is probably the easiest to get a professional-looking result quickly and lots of documentation/help online, Wix is imho the best for design.