To fix the title of the first post hidden underneath the navigation tab, go to Pages, point your cursor to Blog then click the Edit. The Edit Page will open. On the right you will see the section for Page Attribute. Click on the down arrow for Template and choose Blog then click the Update button to save your changes.
Next, go to Settings > Reading. Reading Settings page will open. Mark the Static Page then choose Homepage or whatever page you want to be your static front page. Once you've done that, click the Save button at the bottom of the page.
Reload your page and you will see it will look like this.