There are a lot of persons in over the world who have always tried arduously every hour
This is not grammatically correct. Also, it does not covey your idea clearly. Better re-phrase!
Only a little of them have prospered it is most likely in every field from sport to cinema or even employees in a typical company.
Only a few of them have prospered. .... the latter part is pretty confusing.
Try this structure for your introduction;
Hook - Write a sentence that can grab reader's attention and also has a direct relevance to your prompt.
Background of the Issue - Discuss the issue by introducing the two sides of the argument.
State your opinion - Conclude your introduction with stating your opinion.