Must depress the clutch all the way first before entering gear 1.
Answer 1 is wrong because the operation order is wrong and messy
Checking safety around the car; slowly release the clutch pedal to 1/2 stroke and hold for about 3 seconds; into 1st gear; fully release the handbrake, signal by horn, lights before starting; increase the throttle enough to start, then increase the throttle while releasing the clutch to let the car move.
Check the safety around the car; pedal the clutch all the way; into 1st gear; release the handbrake, signal with a horn, a light before starting; increase the throttle enough to start play; slowly release to 1/2 of the clutch pedal stroke and hold for about 3 seconds, then increase the throttle while releasing the clutch to let the car move.