Subscribe by email does not have a sign up short code or page?

Where and How do I set up the page for site visitors to sign up for emails? Subscribe by Email would suggest site vistors submit their email, to the website and then get email notifications.

We think this would be a good temporary solution to build the subscriber list before officially launching

However we can not find where to allow or how to allow visitors to Subscribe by Email in the documentation or the configuration pages.

Are we retarded? Are we missing something obvious?

Why not have a sign up for our newsletter in the footer perhaps?
Or in any page we want via shortcode?

Very confused why every plugin we are looking at using seems like an unfinished product.

Maybe I should search for code products elsewhere that are not clearly works in progress?