BuddyPress.org

Might be worth adding this link to the documentation on creating a child theme: https://codex.buddypress.org/how-to-guides/building-a-buddypress-child-theme/ It has the other details for creating the stylesheet and activating the child theme as well. Details a newbie might want to have on top of what you’ve already said. I know since I just changed my registration page as you described this week:-)