dnt worry u still have ample of time left and remember nothing is impossible Edmund Hillary once said " Climbing the mountain was not that difficult but the decision to climb it was much difficult" so make up ur mind to achieve the best and dont settle for less first start with the basics but go through it quickly NCERT books will give u the broadest picture, finish them up and about the calculus first go through the 11th syllabus , then it will be much easier, at any point of study if u dont get clear idea go through basics of lower classes best of luck
A man without faith is like a bird without wings
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