I am currently done with my 2rd year in B.Tech and have one more year left which makes it all the mo

I am currently done with my 2rd year in B.Tech and have one more year left which makes it all the more urgent for me to get my name changed before getting into a job. I have looked up web for the same but I wanted to have a reliable source of information given that our government office employees require precisely what there is written in rules and that is very difficult to obtain. Apart from this I also want to know about process of updating the new name in my driving license, voter ID card and university records. Whether I would have to update my 10th and 12th (both CBSE) certificates to get those aforementioned changes done and if it would be required in future, I just can't happen to obtain this information from anywhere. I long for this name change since I want to take up further studies or job with that new name.