@Timtimm Primary source means your priority 1 shd be covering NCERTs first(assuming u hvnt read 'em thoroughly) Then go for secndry source. Questions in level 1 will be quite straightforward(from both sources). Level 2 will require a little more than plain memorisation..ex analysing the sense of question..
@SwatantraRout bookmark the notice board...second bullet has the Plan..
https://blog.forumias.com/sfg/
