There is a long way to go and the extent of syllabus is vast and wide.
There is a long gap by when you will be eligible to appear in Civil Services Examination. Don’t take too much of pressure as chances are while preparing, your interest may fizzle out by the time you are to face examination in reality.
Adopt a slow but, consistent approach for preparation and break the syllabus in small goals so that there is not too much of burden and step-by-step you will keep moving in the right direction.
Begin with NCERT Books and read newspapers daily.
As you advance, you will gain lots of insights that would help you in choosing the correct path and even in selecting relevant books and study-material that helps in an effective preparation.