When on-boarding, I show groups that the new user can join, but the software won't show sub-groups, just primary groups.

I want the capability for a user to choose several interests, activities, and 1 or more geographic groups to follow activity in. Examples….. [ sub-groups are separated by / for THIS post and the levels expand when chosen to reveal several sub-groups in each level.]

Interests: Sports / Rugby / Rugby League

Interests: Sports / Football / College / SEC / Texas A&M

Activities: Aviation / Airplanes / Amphibious / Turbo Prop

Location: Americas / USA / Texas / North Texas / DFW / Dallas / North Metro