Dear aspirant, 

As you got 89 % in pcm and 75 percentile in jee mains  which is a good result . But as you said you are a repeater which means you know the contents for the exams , how to prepare for jee mains and advanced , so you can do a self study at home . See the thing is , you said you are poor , im being honest with you , the coaching classes  fees are nowadays RS. 2 TO 3 LAKHS FOR TWO years . So, for you it may be upto RS. 1 LAKH for a year, so instead of spending your parents hard earned money , it is better to learn it by yourself . Nowadays, there are many online platforms which gives you complete guidance for JEE MAINS AND ADVANCED and you must have friends who can also give you guidance right ? , so ask them about .

If you want to join coaching classes for safety , if you can manage , then should join them , there are many repeaters batch in every coaching classes for jee mains and advanced, they can give you proper tools like notes , tricks to solve big questions  and practice exams  that they take every week to know at what state are you currently and it will also give you more confidence in getting excellent marks in JEE . 

HERE IS THE BOTH SIDE FOR YOU , IT SIMPLY DEPENDS UPON YOU . SO BE CLEAR ABOUT IT AND  TAKE A PROPER STEP AHEAD AS YOU WILL SPEND AN EXTRA YEAR FOR THIS EXAM.

THE COACHING CLASSES IN NAGPUR ARE :

1) IIT HOME 

2) BANSAL CLASSES

3) RESONANCE EDUVENTURES

4) AAKASH INSTITUTE 

5) FIIT JEE 

6) MOTION 

You may know about RAO - IIT AND PACE IIT AND MEDICAL . These are also one of the best and reputed coaching classes. 

HOPE IT WLL HELP YOU.

ALL THE BEST FOR YOUR FUTURE.

Dropping a year and preparing again is a tough thing that requires determination and focus. It is never each seeing your friends enjoy their college life where you are confined to a room to study. Often this is the time people deviate from the path. If its financially possible for you, go for coaching as not only they provide sufficient material and clear path to follow, but also give mental strength and competitive environment to test your position.

Since you are a SC candidate and also a girl, if you put in slight effort, your output will be high. So go for coaching I would suggest. Best of luck