It may be possible that you are simply aiming your domain to the host incorrectly. First thing to do is create a file called index.htm and fill it with:
<html><body>Hello World. Test Worked!</body></html>
Save and Upload this to your site then visit the site. If you do not see the text then it means you are aiming wrong and placing the files in the wrong host location.
You can also read how to install WordPress at this document.
If you know how your host has been setup, make sure the basic requirements are met by going here.
All the best. Good luck.
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