Sixth forms with best drama department (Cambridge/South Cambridgeshire)

Hi! I am currently in year 11 and looking into sixth forms. I have no idea what I want to do in my life, only that I want it to be worthwhile.
While I want to pick options that will lead me best to Oxbridge or Ivy League, the uncertainty I feel makes me wary of choosing wrong A-levels that will largely determine my future. Especially since my scope of possible options changes every few months.
I have been recommended to not focus on career focused A-Levels, but rather to pick what I enjoy. Hence, following my musical theatre journey feels like a right choice to have on the side - I just performed in Gypsy at the ADC in Cambridge. Therefore, I am looking at sixth forms with a good drama department in the area of Cambridgeshire.
Thank you for reading, any advice will be extremely helpful.