fandom as I became aware of sports about 2nd grade. Ability to read and comprehend the newspaper and expand my capacity to hunt and find games on the radio (We didn't have a TV in those days)
About the same time my dad allowed me to accompany him to High School Football games Friday nights in our smaller town and let me free wander as he had to work fundraising at the snackbar. (He was a High School Teacher) Then Basketball games.
Those were great days. Small Towns are a treasure.