Changing Theme Home Screen

Hey guys

Wondering if any of you know of ways to make your home page something different than what your theme provides. I love the theme I’m using, however my team would like something more simple on the home screen. Of course this cant be achieved through the customizer, I’m thinking about just uploading my own html + css files. No clue how to do this while keeping the rest of the theme, though.

Thanks everyone!

The page I need help with: [log in to see the link]