Really easy to change. I change both dipped and main beam H7 bulbs last year with Osram nightbreakers.
All you do is from memory, put your behind the H/L unit and there is a light grey plastic holder, turn it quarter turn (not sure if it is anti or clockwise) and the holder comes away, with the bulb in sutu, then pull the bulb out, put the new bulb in and put the unit back turning the opposite to what you did to undo. It tell you in the manual.