is it necessary to follow the blue print given by its own
Hello student usually blue print is a kind of over view of the topics which you need to cover for the examination but its preferable that you should cover the whole syllabus so that you can easily solve each and every question come in the examination question paper. Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert.
Feel free to comment if you have any doubt
Good luck