How to start adding content?

So I’m using SiteGround as my hosting service and it’s telling me that I can start editing the content of my page through my wp-admin URL where I log in with my username and password, but when I go to the URL, it gives me the default “My Site. This is my site description.” page and it only lets me log into GoDaddy which is where I bought my domain. I already uploaded the archive file to the cpanel under the public_html folder also. Am I missing a step? I couldn’t get to the “Create a Configuration File” screen either.