Where do I edit my child theme styles?

Hello. Am using Software Download theme. I was naughty (well lazy really) and didn’t create child theme. I added lots of css to my parent theme Dashboard > Theme Options > Design Setup til it looks rather full.

decided I really should use a child theme so just created it now. (style.css with all my Design Setup css from parent theme code and functions.php to wp_enqueue_scripts the import of the parent stylesheet… blah blah)

Where do I add my styles in my child theme so they take effect?

I see the parent style.css has the following:

[code title=””]
/*
NOTE THIS FILE IS NOT USED WITHIN THE THEME
THEREFORE ADDING CONTENT TO IT WILL NOT WORK
*/
[/code]

Does this mean my style.css in my child theme will not work?