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It doesn't matter which book is best, what matter the most is how  dedicated you are, prepare notes keep practice and choose a good university,   not the Online and distance one, because distance and online education will not be  teach you the skill sets which are demanded in corporate word . Even if you are going to choose  other career options like phd. Or anything else, you should have contact with your Faculty because they are the one who will guide you or direct you, if they are not know you they will never give you the correct advise and perhaps wanted to down your morale . 

Yes, you can get admission in various colleges if you have cleared the entrance exam despite having less than 60 percent in 12th except some top universities like SRM, VIT, LPU, Amity, etc.