Putting newest post on html page

I’m trying to put my latest post onto my main page. My main page is in a different folder than wordpress is setup in. It is also done in html, and not php.

I’ve seen the get_content() method, but I am unsure of how to implement it correctly. I have tried a few different methods, but nothing seems to work.

I’d like to use it to get the latest post from my blog to my main page.

Any help/thoughts would be great appreciated! Thank you!