Yes it sounds like you’re on the right track, you just need to look in your home.php file to make the changes to the html/php code. The widgets are wrapped inside of the different backgrounds that you see. So you would need to create an extra widget next to the ones that are already there (just duplicate and rename) and that should be it. Make sure and register your new widgets in your functions file. There is a lot of info on how to create widgets on the StudioPress tutorial pages.