WordPress though simple to use it is a very big product with many features. This can make it a daunting task to learn WordPress. Thank goodness and the WordPress community for many fine resources like the WordPress.com support pages. WordPress Basics and Beyond Tutorials.
There are outside sources that will help you beyond WordPress.com.
There are also the WordPress.org resources. There are tutorials and forums there as well. Some of this information is not relevent to WordPress.com like software installation and plugins but mostly it is the same.
Here are more tutorials on YouTube.
You could Google it. Here’s the Google search results for WordPress tutorials. These Youtube and Google searches are the results for WordPressbut you can try WordPress.com. Or you could be more specific like “wordpress tutorial for beginners” or “wordpress tutorial 2011”.