hi,

it does not matter whether you take online or offline coaching, but taking online coaching has its benefits, like you can continue to study from the comfort of your home, your fare expenses will be saved as well as you time, but the main thing is how much you have revised or give time to problem solving, in most of the coaching lecture they give priority to give the ideas of syllabus and make lectures on mostly for theory parts. so you need to self study a lot to solve the previous years problems.

hope you understand.