The easiest method for installing WordPress is by connecting with SSH. We have pre-installed WP-CLI, a command line tool for WordPress on all Bolts.
To install WordPress with WP-CLI you simply log on with SSH.
Then navigate to your root/public/ folder and run this command
wp core download
Then you have downloaded all the necessary WordPress files to you public/ folder.
The only thing you need to do now is to set up the installation by going to your site URL.
You can also download all the files for your WordPress and upload them with a FTP program like FileZilla.
First you need to download the necessary files from WordPress.org.
Then you need to connect with SFTP, I recommend using FileZilla for this.
Here are an article on connect with FileZilla.
And here's an article on how to use ut.
When you've connected to your server and downloaded your files, you simply drag them over to your root/public/ folder.