Why do you want to go for coaching ? Going to coaching is just wast of time and money. They will not guide you the best. Even they will prevent to read good books. They will say that our coaching material is sufficient. But that coaching material is nothing.
Start self study from right now. Read Your text books (Provided they are good ) along with RK Kanodia GATE CLOUD series book. Definitely you will gain confidence in self stduy.