From the family detail panel
Click 'Schedule discovery call' (NBA when status is 'New').
Pick a date and time. The modal pre-fills a 30-minute duration.
The default title and description come from the meeting templates; edit if needed.
Hit Send. The system creates a Google Calendar event with a Meet link, sends invites to you and the family, and stamps the card to 'Discovery Scheduled'.
After the call
When the call is done, open the family detail panel. The NBA will be 'Mark discovery complete'. Click it; the card moves to 'Discovery Complete' and the system suggests the engagement letter as the next move.