In order to download and install Joomla, you will first need to create an account on the official website. After you have created an account, you can then log in and click on the Download Joomla button. The next page will show you the different download options that are available. You can select the download option that is best suited for your computer.
After you have downloaded the file, you will need to install the software. The installation process is simple and all you need is to follow the instructions that are provided. After you have installed Joomla, you will be able to start using it right away.