You will pass your driving test if you make no more than 15 driving faults or "minors" and no serious or dangerous faults "majors". The driving test examiner will tell you about any faults you made after you've completed your test (if you had any) and will issue you with a pass certificate. Your provisional license will be redacted (removed to be changed for your new full UK licence( and your driving examiner will ask if you want your full licence to be sent to you automatically.
If you do not want your licence to be sent to you automatically, you need to apply for your full driving licence within two years of your passed test date.
You are now officially allowed to start driving straight away and do not have to wait for your full licence to arrive before getting behind the wheel solo! If it doesn't arrive within three weeks, contact the DVLA. You are still a new driver and as such, it is advisable to take your time and build up your confidence to become a safe driver.
Although you can drive before receiving your full driving licence, you will need to ensure that your car is fully taxed, MOT'ed and that you are correctly insured to drive the vehicle.
If you previously took out learners insurance on your own personal car, you will also need to let your insurance company know that you've now passed your test, as they will need to update their records and charge any fees accordingly.