recommended theme for a store

Hello,
I’m wanting to use WordPress to set up a store inside one of my sub-domains at BlueHost.

I’ve used the WP theme of Twentytwelve to set up a blog on one of my sub-domains; but this is the only experience I’ve had with using WP. I had a difficult time understanding some of the terms as well as what was a default; however, it is up and running.

Can anyone make a suggestion as to what WP theme would be the easiest for a novice to create a store with? (The store I want will be very simple and will most likely be temporary as all I want to do is sell what I no longer use since my retirement from the professional world of employment.) Any idea(s) as to what theme might work best for such a store would be appreciated.