Family members of an athlete can be added as Guardians, allowing them to be involved in the athlete's sports life without being the primary SportsEngine account owner.
This on demand Video walks you through scorekeeping.
This link from Sport Engine explains how to sync your phone to the CAHA Calendar so you get automatic updates as the game schedules get finalized.
Every team page will have a synched calendar as well. No need to try to navigate the CAHA website