Drupal is a very powerful platform that is popular with web developers and experienced coders, but it comes with a very steep learning curve that makes it a bad choice for beginners.
Joomla is similar to WordPress and works great for online stores, but you’ll need at least a little bit of technical coding to make it work the way you want.
If you want more details, I’ve put together a pretty comprehensive comparison between WordPress, Joomla and Drupal.
If for some reason you don’t want to build your site with WordPress, check out my Drupal, Joomla and HTML5 guides as well. They are all FREE to use.