Did you mean it's from the finding of successful stories of people with the same blend of skills I have that I develop it into my essay? So in my essay, i will be saying that I could be doing something like that successful person (without actually using his name or anything in the essay)? I really feel my English is so broken here urgh.
Well, your English is not so bad, because you are correct in your interpretation of what I meant.
I think you are going to do very well!
My advice was all about showing them a "picture" of the future. Show the reader what you want to do.
If you run for president, people will only vote for you if you say, "I can use my knowledge as a teacher of English and an NGO to do ______(fill in the blank.)
So, it is the same here. Show the reader that you want to do something specific. When you read about what is going on today in the field of Dev. studies/Int. development -- when you read some great articles about what people in the field are doing -- you will get some ideas about what YOU want to do with your unique skills.
Make yourself useful, ha ha. :-))