 No need of reading such huge books, everything is there in this, NCRT. But you need to know how to read it. Number one, always start from the beginning. Introduction is very important and contains a lot of information. And do not skip figures and table because you might get questions based on them. Solved examples in the textbook are a great way to understand how to do problem solving in the topic you have just learnt. Do solve the NCRT exemplar because they contain great quality of questions. Solve previous year questions after every chapter to get an idea of your level of preparation.