How do I Hide the Post container

Hello this is my first Blog and I’m pretty much a beginner with CSS and HTML, word press. I want to Hide the post container on my site so all you see is the Background. I don’t want to delete it because from what I’ve read search engines need it to find post etc. so deleting the code is out any help would be great. If you could please be as specific as possible because like I said I’m still learning.

Thanks in advance
Lorrin
https://subleveltransmission.com/