StoreFront WordPress theme: How can i create a new Home page with Custom design same as template [closed]

First step in modifying a theme, is creating a child theme.

Now that you have a theme that is basically the same as the original, you can simply copy files of the original theme that you want to modify into exactly the same relative location as in the original theme and modify them to whatever you need. In your specific case, after locating the page template for the home page and copying it you can just modify the code in it and there is no need to create a new one.