Hello Ashritha,

It completely depends on you, and your preparation. Targeting for competitive exams like JEE and NEET, it would a wise decision to join some crash course in any coaching institute, as it would provide you a quick revision and even the test series would help you analyse your preparation. You will have a proper structured schedule and solve more specific questions. But opt for crash/ short term course only if you have completed your preparation, and now you think more and more revision will benefit you. Because once you join a course, you will reduce the time for self studying. Therefore, if you have'nt completed the syllabus upto your expectations, then don't join the course, else if you think your preparations are sufficient go for it.

You may also subscribe some online test series if you think you will waste time in coaching. joining an online test series will give you almost same benefits, and your schedule can be customised as per your requirement. Refer to the below link for an online course:

https://learn.careers360.com/knockoutfull-jee-main-april/

Hope this helps