Hi there,

Yes definitely you should join any crash course for preparation of JEE mains. Because it is hugh time now if you really want to achieve a decent rank or wants to qualify the examiamtion then do whatever it takes.

See, opting for crash course is good but you must understand that self study is very important because it makes doubts clear and also improves learning ability.

So prepare well and be focused.

All the very very best dear aspirant!!!