Hello again Graham,
Let's start over to hopefully cut down on the confusion. The default settings when you first install WordPress is that the Front page of your WordPress site will display blog posts. Your Front Page is what people see when they go to alaskatoargentina.net. Just create posts and they should appear on your home page (unless you have a theme that does something different).
Perhaps the best way to see this in action is to change to the default theme, add some test posts and then view your site.
Now, if you instead would like to show a static page for your Front Page and have your posts on a separate page, that's when you create the two pages (one for the static page, one for the posts). After you create the two pages, change the settings in your dashboard (Settings > Reading).
With all of this being said, it's altogether possible your theme has some different behavior if you aren't seeing the normal WordPress behavior. If that's the case, you'll want to check with your theme developer's documentation as the Modest theme you care using is a paid theme.
Hope this helps!