You know when you have the biting point of the car because the noise of the car will sound different from when you switch the engine on (and usually the back end of the car dips down slightly). It's easier to learn the biting point in a diesel car because you can hear all the noises louder than in a petrol car and also you're more unlikely to stall too.
To get the biting point:
-Press the clutch down right to the floor and keep it there.
-Select first gear on the gear stick.
-Press down on the accelerator just slightly.
-Then bring up the clutch pedal slightly until you hear the car engine noise change slightly- this should be the biting point of the car.
Then move off:
-Put the handbrake down (off) and press on the accelerator a bit more and you should start moving forwards.
-Take your foot off the clutch and at the correct speed change to second gear.
To get the biting point:
-Press the clutch down right to the floor and keep it there.
-Select first gear on the gear stick.
-Press down on the accelerator just slightly.
-Then bring up the clutch pedal slightly until you hear the car engine noise change slightly- this should be the biting point of the car.
Then move off:
-Put the handbrake down (off) and press on the accelerator a bit more and you should start moving forwards.
-Take your foot off the clutch and at the correct speed change to second gear.
But for a more useful detailed explanation watch this video: