I can't access Wordpress login page. Help!

Hi everyone,
I'm new here so i was setting up my first site, i bought a domain, installed wordpress app and when i tried going to "my-username/wp-admin/" it loaded a blank page! there was literally nothing on it. Sometimes i got an error message saying "The resource you are looking for has been removed, had its name changed, or is temporarily unavailable." I use a default domain and an economy cPanel linux hosting (it was a basic package) so am i missing something?? Cause i can't access my wordpress page apparently
Please help!
Thank you