Choose one meeting duration and define working hours, buffers and the questions needed before the call. Connect the calendar you actually use, then test a booking from another time zone and verify its confirmation and calendar entry.
A single event type works well when most appointments follow the same format. Review the free tier after any introductory trial so paid workflow features do not become accidental dependencies. If different meeting lengths or several calendars are essential, compare the paid plan before sharing multiple booking options.