1) how do i do the first mission in a tank as the russians, i keep dying and can't seem to figure out what im doing wrong
2)How do i unlock the british and russian missions

1.) stay in first person mode to aim easier if your being shot look at the red line thing that pops up in the middle of the screen. if you still cant find them switch to third person hold L and rotate your turret.

2.) To unlock the british missions beat the russian missions.

the russion missions are already unlocked.

to unlock the american missions beat the british missions.