showing all posts in order on a page

So i am designing this wordpress site for someone, and to be honest, i am not super familiar with wordpress, but I feel like I did a pretty decent job.

Anyways, here is the site:
THE t-shirt printing site

As you can see, the main page is a static page because this is more like a company website than a blog.. But they still want a blog.. So when you set the main page of the site as a page, where does that “all posts” page go?

How do I link to the posts page so that when you click on about -> blog you get a typical blog look.. I was thinking i would have to create a new page but use some type of short code to show a certain number of posts.. but then I figured that the posts front page should be somewhere.. right?

any help is appreciated