As per my opinion if u r doing graduation and last year so u can start 1st u print out the syllabus hard copy then read it well and try to understand those things
(2.)then u take previous year questions pepar and read,understand and connecting with syllabus and make a simple analysis this thing is something boring bt don't worry after sometimes u will be like to analysis
(3)read basic level of ncert (political, history, geography.....) class 6-12th if u r finished reading all this thing then u can feel many topics r same bcoz lower level to uper level of class it was just explaining details so don't try to making notes first
(4) and read daily the hindu newspaper first time don't try to make notes first u read and try to distinguish every topics between syllabus

5. this is the basic thing for every upsc aspirants and this is just first step for beginners.

so first u do this and u there any types of awry then don't worry just consider it. bcoz today I first join this aap and doing first comment. all the best