Hello Rohit

For becoming a cyber security expert you should choose CSE branch in college.In first year try to develop attitude of learning language C after this new language such as C++,python are also necessary.In second year Learn data structure subject,try to develop attitude towards coding after this do competitive coding.Use Udemy courses for becoming cyber security as most of colleges doesnot have good teacher in this domain so online learning is best.In Third year Do algoritm subject After all this you can do cyber security courses from Udemy..For Becoming expert in cyber security domain practical knowledge is going to be more important than degree and college.

Hope this helps you.If any queries remain than comment below.