WordPress Online

I installed Wordpress using godaddys built in app. All the files are now in my websites file system but the default site looks nothing like my site. I want to add customize it so my banner and top nav bar is the same in the blog as the rest of the site, how can I do this? If wordpress doesn’t support this then what can I use instead?

I am new to Wordpress and trying to edit my site I have figured out how to add links to create pages on the navagation bar but when I go to those pages on the website itself the screen reads “Sorry, no posts matched your criteria.” Can anyone tell me what I’m doing wrong?