Is it okay to repeat JEE?

Hello, Yes, it is good but this will benefit you only. When you score well in this JEE Mains and you could not qualify any IIT by less marks because if you start from scratch, then this will be tough for you to achieve well and you will cover long route to get IIT. Think twice and then choose.

It is okay but you should have to prepare well read all that thing that you know again and also which you do not know.