How to correctly build documents on the hosting so that the URL is displayed correctly?

Question

Create a sitemap

Good afternoon! I am a newbie, I created a website on a hosting. CRM did not add. First, the employer talked about the lading page, now you need to try to create a website. How to build links without CRM so that they are correctly displayed in the URL. I create a news folder - in the navigation menu, the news.html file gives an error 404. I even tried to rename the news.html file to index.html and upload it to the news folder without success (it is issued only by the link site/news/index). It is necessary to create a news page so that later the user can go to each news. I created a page with news blocks, but I can’t write the link for the button correctly. Tell me how to be? Thanks in advance!