Tell them আপনি really want to play and প্রদর্শনী them that আপনি know how to play. Keep fighting until they let আপনি play football. If আপনি take no as the final answer they won't take আপনি seriously for any other sport আপনি might want to play. In my school, there is a girl on our football team and none of her teammates treat her differently. Teams from other schools have a lot of respect for her.