Disconnect both battery leads
chock the back wheels,
jack up the front and support it on axle stands, (MAKE SURE IT IS SOLID OR YOU COULD DIE)
The starter motor is found behind the engine, near the inlet manifold.
remove one bolt from above the engine then get under the car.
remove all cables underneath , remembering the order.
remove 2 bolts from underneath the engine and remove the motor.
re-fitting is simply the reverse of removal.