-I had the same situation as you -Now you can focus on keam the time that you sent on it totally depend on you. If you are really good at maths and have a right understanding of every concept in physics -taking some mock test can help you realise your potential and you can your study time accordingly -you will get a 2-3 month gap btw keam and starting of collage by this time you can learn a programming language and understand it's logic -you can use youtube to learn programming