I don't think this is a chit-chat thread.
What a thinking man - best piece of advice.
Harsh dude. Take Maths, physics, chemistry. English, in India is actually compulsory so yea you gotta work hard.
Why do you want Biology, environment and computing? See, if you want to go for computer engineering, EMS and Bio are useless. A levels is no piece of cake man.
Also, didn't your school start yet? :S