Is this suitable for me - Media studies A-Level

So im in year 11, trying to work out what i should pick for my A-levels. I have decided i want to choose chemistry and biology. I would like to go into optometry, but i dont know what to pick for my third option. I wanted to do computor science but firstly its in the same option block as biology and secondly the head of 6th form has advised me to not to pick it, along with 2 sciences. I am struggling to choose that third option, i read through the option block sheet again and have realised that i dont want to do any of them. However media studies has caught my eye and ive wondered what it is, how hard it is and if its the right option for me. If you know anything about it please reply, i need help. The only other option is psychology but its in the same option block as chemistry.