First time I played football

The first time I played foot ball I was 9 years old .When we I first went to practice I was nervous because I didn't know how to play .When I got there one of my coach said come up here an tackle him and I said ok .When he blew his whistle I went to hit the boy on the legs then he had moved out the way then I said why you moved out the way an then he said idk.