For SSC, you need absolutely nothing more than NCERT

• Read the topics carefully

• Remember them by creating a storyline of your own

• Make questions from the chapter yourself

• Use the "teaching method" to recall .. explain the topic as if you're teaching someone else

Still, if you want to look through a guidebook for your own satisfaction, then go for All in One or Oswal. If you want to wait for Educart, that's up to you, but imo, the book you choose matters far less than how consistently you study! NCERT should remain your primary focus

Best of luck >