Mobile View Different From Desktop View?

I’m brand new to WordPress, and just set up my page today. It’s very basic. But when going to the link on my iPhone, the first page I see is my “contact” or “about” page, not my home page. When I click on (sorry, I don’t know what it’s called) the three stripes up in the top left, I get a screen to the left that says “Home,” with black blank space beneath it. When I click on the “Home,” I get a “not found” message, and then “This is somewhat embarrassing, isn’t it? It looks like nothing was found at this location. Maybe try a search?”

Is there a setting I need to change so that when someone views my site on an iPhone, for instance, they land on the Home page rather than my “About” page?

My site is casecatalyst-atoz.com

Thanks for any help. I did search first, but since I’m SO new at this, I’m not sure I even searched for the correct thing…