Step One -- Login to your google account on your browser.
Setp Two -- Find the Team Calendar you want to add or use the full Athletlic calendar that shows all calendars.
Just the football calendar -- https://www.fvhsboosterclub.com/FB-Calendar
Step Three -- Click the Add Button down at the bottom of calendar.
Step Four -- Next click add Button to add the calendar.
Step Five - Verify Calendars were added to your calendar. You should now see both your personal and team calendars.