Installing of Joomla! is pretty easy. We assume you have set up your website and you can access it via your browser (i.e. Internet Explorer, Firefox, Chrome)

Download Joomla!, save it to your local hard drive, unzip it, and then upload/copy the files into the directory you website points to, start your browser and enter your website address, and the installation will start.

For full details on the installation processes check out the Joomla.org website; questions are answered on the forums.