Most of the youth in our country have faced similar issues as you. Nothing is new. Failure is part of life. Key is to trust in Allah and after that in your own abilities. That is the first step as without that belief any journey would seem hard and bound to fail.

Moving on to whether you should join an academy. There are 2 factors that come in my mind after reading your post:
1. Joining academy will not change your mindset. You have to change your thinking yourself. Further when you compete with people in an academy it might bring even more torture. So please think would you be able to cope with pressures of an academy.
2. On the other hand having proper guidance does give you an edge. Specially the well known academies with proven track record can help you towards success.

Wish you best of luck!