I appreciate your aim to become IAS officer in future.The problem that you are facing is that which lots of students suffer.Due to lack of time management ,candidates are unable to achieve your goal.
But friend it is bitter truth that if you want to achieve some thing special ,you have to be different from other.There is motivational line which is as below:
"The heights by great men reached and
kept, were not attained by sudden
flight, but they, while their companions
slept, were toiling upward in the night."
That is you have to make a strategy according to which you will have to work.Time management is one of the vital component of preparations.After having 8 hours of classes in engineering ,making assignments,practical copy etc it is very difficult for any one to prepare for some thing other.
But if you want to achieve any thing special ,you have to make a unique routine which involves preparation for the civil services examinations at least two hours a day and fours in the weekend.
Make habit of reading standard newspapers,watching news bulletin,reading magazines,try to be updated with the current affairs.
Always motivate your self that you can do it.
Never lose your confidence and be determined to your goal.
Hope the information helps you.
all the best