I want my site design like this

Hi there,

That's a pretty simple layout.

What issues are you having?

Let me know :)

How to have a single page website without blog site?

And is his content on a page or post site?

- Choose a static front page and don't assign a page to the posts page:
https://wordpress.org/support/article/settings-reading-screen/

- The example site is using a page template.

Let me know :)

Great thanks, adjusted it like you said.

No problem :)