How can i stop bein scared to do my back walkover?

ok so i made the cheer team (woohooo) but like it seems like when i do my back walkover i get so nervous! idek y! yes i did just lean to do it correctly and stuff but i just get so scared because im used to puttin my left foot out instead of my right so i get scared! how can i stop gettin scared because when i get scred i fall!