Why not look into a service like (yes I'm self-promoting :-\) http://beartful.com
You can upload your images and have an art store with a custom subdomain (http://eric.beartful.com
for example) for free. Right now the customization options are pretty basic, but require no knowledge of web code.
Also, if you don't sell any of your art, it doesn't cost anything. When you do sell something, the company will print and ship it (and you can check your account 24/7 to keep up to date)
Anyway, just throwing it out there because it sounds like it would work well for you! Making your own website just so you can sell your art would be a lot of work, especially if you start getting into the e-commerce side of things, which requires upfront money, an official business (usually), and a monthly fee, on top of web hosting and web development charges.
This is at least a free service specific to having an online art store.
Let me know if you have questions