The trend of learning in an institute has increased.
.... This is not a strong sentence to open your essay. I think you better start with the next line
I believe that fast learning, authenticity of knowledge and chances towards the secure jobjob opportunities are the main reasons for this trend.
... This has several grammatical errors. Also, I don't get why you had fast learning and authenticity of knowledge as two reasons... For me, they don't seem to be strong reasons. There are more obvious reasons such as gaining credentials, preparing for future careers, networking opportunities etc.