Noob questions guys.. sorry since i only drive manual kancil before

i) Can we change the gear from D to S mode while driving or we need to do it before the driving itself
ii) S mode is auto or manual or both
iii) Let say in s mode, how to change from manual to auto again

Whatever other people say.. i already prebooked mine during the power of 1 event.
Black color.. cfe.. yesterday sa told me my chassis no already out might get the car latest next week