Hi and a Happy New Year to you too,
If your car has got xenon's then it will need to be put into basic setting first then adjusting, if they are conventional lights
adjusted by 2x5mm allen key adjusters one adjusts up/down the other left/right, you could adjust by parking close to a wall at night and then pulling it down to you get roughly level with the other one, otherwise any MOT test station can put it on their aligner and adjust it up for you.
Dean.