Can't find dedicated blog page

I can create blog posts, I can find all my blog posts individually. What I’m having trouble with is finding one page which displays all my blog posts.

I’ve looked through my settings countless times and I just cannot work out how to set up a page (for instance mysite.net/blog/) which would contain all my posts. This is what I really want.

If this still isn’t making sense then I think this will best demonstrate it…

Here is the demo site for the theme I’m using:
https://www.moonthemes.com/elegant/

You will notice he has a ‘blog’ in the menu, which when clicked takes you to /blog/ containing all the blog posts on the site.

That is exactly what I would like to have on my site. Here’s the url if it helps: https://www.portablevaporizers.net/

There’s probably a really easy solution to this but I just can’t see it. Thank you kindly in advance for your help!