changing fonts in buddypress corporate theme

I am new and learning wordpress. Please help.

Trying out with creating a child theme. I need to change the font and background color of the front page.

Not sure where i could go in and change. Style.css does not have any styles in the theme folder. I have a page setup for homepage. I copied index-home.php to the child theme and added a line and i am not seeing the changes on the page when i reload the page

let me know. Thanks. .