To install this theme you must have a working version of WordPress already installed. If you need help installing WordPress, follow the instructions in WordPress Codex. Below are all the useful links for WordPress information.
WordPress Codex – General info about WordPress and how to install on your server.
First Steps With WordPress – General info about multiple topics about WordPress.
FAQ New To WordPress – The most popular FAQ’s regarding WordPress.
Please note that themes does not work on WordPress.com sites, because WordPress.com does not allow you to install custom themes and plugins (only allowed if you use the Business plan).
You will need a WordPress installation from WordPress.org running on your own web server.