i want to edit music videos, i am in year 11 and need advice about what subjects to take at a-level, i might be doing ICT, computing, psycology and either media or graphics but i cant decide between media and graphics, which would be best?

i have a chance to do music technology, but i do not know exactly what is involved with it, do you think it will help me edit music videos?

and how easy/hard is it to be a video editor?