First of all, I wish you all the best for your future.
An institution can only do so much when it comes to writing your entrance exams well. It all comes down to your personal hard work and determination which will get you a seat in a top engineering college.
I would advise you to join FIITJEE. It’s one of the top institutions in the country which can train you for these exams are really help in understanding why these exams are designed to be difficult and how to crack them. Its branches are there all across the country. You can go to FIITJEE and enquire about their track record and how many people it has managed to help in securing seats. Plus their teaching staff is brilliant and they are ever ready to help the students. They also provide you with a big book consisting of all the previous years’ questions and also materials for each subject.
I know this much about FIITJEE because I previously studied there in the Visakhapatnam campus. Trust me you will not regret it.
Hope this post was helpful!