Millinda,
I can recall the first time I had to use a MySQL database and things like usernames and config files and I found it hard. However, since then I’ve installed WordPress many times easily. If you’re not a techie person (and there’s no reason you should be to use it), you could host your blog at wordpress.com and install it in seconds with no knowledge.
Otherwise, if you’ve FTP’d the site and done evrything successfully, it could be a simple ‘permissions issue’ with some of the files? That means they’re not set to be publicly visible.
I’m sure it’s something very simple and you’ll soon be running.
Regards
Neill W