For any beginner, one of the big problems they confront relates to preparing General Studies. Now, with number of papers increasing and weigthage going up, it has come on centre stage.
The most satisfying thing is that now, the new scheme for Civil Services (Main) Examination has a well defined syllabus.
As you plan to appear in CSE 2015, you have enough time to prepare General Studies in a planned manner. To build a base, you should start with NCERT Books and make a habit of reading newspaper daily.
To create curiosity, first read the subjects that are of your interest. Make a beginning, as you move on, you develop awareness and realize that you value what you are reading.