One of the benefits of using wordpress is that you can easily install and use themes to give your site a different layout. Here is a tutorial showing you how to install a theme.
Log in to your dashboard, and click on Themes in the Appearance tab.
There will be two tabs at the top of your Themes page, the Manage Themes and Install Themes tabs. Select the Install Themes tab.
Once you find a theme that you like, click Install.
A new page will load, and shows that your Theme has been installed. You can then activate it, to make it the theme on your website.
If you have any questions, feel free to leave them in the comments section below.