This one is easy, but not easy to discover at all. Here’s how to add it:
1) Go to the appearance section and select menu to open up the navigation builder.
2) In the left hand column in the pages section, click the link that says “See All.”
3) Once you select that, WordPress should give you a link called “Home” that you can add to your menu.
4) After you’ve added it save your menu.
That should give you a button to home. Let me know if you have any other questions.
Enjoy your weekend,
Bill