It depends on you if all your concepts are clear and you just need to revise it then I dont think coaching is required but in case,your concepts are not clear and if you need someone to guide you and teach you the topics then you should join the coaching. So basically,it depends on your preparation status. 

Also, Smart Learn Academy, Venper Academy, Acceleration Tuition Center are decent to join.

So if you want to join the coaching then I would suggest you to research on your basis and before you join the one better to take 2-3 demo classes and if it works for you then go ahead and if you talk about the fee structure then it varies institute wise so you can check the same by visiting the shortlisted centers.

Good Luck!!!