I am not actually what you might call an expert on this + if truth be told, I have actually tried installing WordPress twice, once when I created my travel blog + another when I created my food blog {which is actually sleeping dormant right now, waiting for when I’d muster enough guts to blog about food}, which are both sub-domains. My travel blog is up + about, so I guess I did the right thing 
If we want to have at least a basic know-how on how to build a website, we should at least know how to install WordPress on our blogs, right? Here are the steps I took when I installed WordPress on my sub-domains:
- Log in to your cPanel + create that sub-domain if you haven’t already. For example, you have created the subdomain myblog.website.com. Just click on the Subdomain option.
- Go to Fantastico {the smiley button} + click on WordPress from the list of Available Packages under Blog Section
- Click on the New Installation tab
- In the Install WordPress tab, choose from the list of subdomains where you would like to install WordPress, in this case to myblog.website.com
- Fill in the required information based from the prompts to complete your WordPress installation
- Make sure you fill in the correct information + don’t forget to take note of your admin access data, which you will use later on to access your new blog.
- You can now view your brand spankin’ WordPress blog by typing myblog.website.com on your address bar
The steps might have been altered one way or another since the last time I installed WordPress on my blog, but I am sure you will find loads of other tutorials you can use to brush up on the knowledge. Good luck on those WordPress installation + happy blogging
wordpress image is not mine