I'd like to challenge myself to learn most subjects in English, because I am aspired to go to the top universities in Hong Kong, that happens to be taught in English. I've also prepared myself to take up such challenge in the past: (state what you have done to prepare to learn in English).
Besides, your school is good at creating a English language rich environment for students to learn English effectively and joyfully.
I'd like to challenge myself to learn most subjects in English, because I am as ...
Oh no! You are too pathetic ! And you think education is just simply learning English !?
I would rather referring education as a life-long learning experience. Schools should prepare or equip their students with what it takes to cope with the challenges that they will face in the 21st century.