customize genesis blog comments fields

hello,

i’d love some help customizing the blog comments fields, i am using a child theme, though the creator has said this is to be done through the genesis functions.php file.

i’m lost! i’d like to edit the ‘leave a reply’ heading, the ‘comment’ wording above the comment box, and the ‘post comment’ words on the submit button,

i’ve been through the documentation here though am not a developer so haven’t been able to sort through it all in a way that is clear for me to implement. any help is much appreciated, thanks in advance!

kendall