hey Amith, first of all a coching is not a necessity unless you are confident enough about your plans or preparation, ofcourse you can crack Aims without coaching but for that you will have to focus and make a proper strategy for your preparation in a proper time.You will have to motivate yourself everytime and be determined about your goal.A proper and systematic notes is the key for clearing any competitve exam ,so keep that thing in mind always. Practicing these habits daily would leave no stone unturned to crack your exam.

Hii Amith

It depends on your level of preparation and access to study material which decides whether you require a coaching or not because self preparation is the key to success.The better you prepare the better you score.

Hope the details were helpful

For futher more details about AIIMS,please do refer the link given below:

https://www.aiimsexams.org/

Thank You