Unable to setup WordPress Website

my website is (real name hidden) http://www.example.com/

I am trying to setup my website on wordpress. In my FTP file manager I have created a folder named “example” which is linked to this URL.

I have uploaded all wordpress files under this “example” folder on server by FileZilla. MySql database is also ready. So now my task is to install the files for which I tried to run
http://example.com/wp-admin/install.php

but unfortunately it says:

Not Found

The requested URL /wp-admin/install.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

any idea? how to get it done now, please?