This is just an example, so may be i can help you guys. 

 "My first job was a shop assistant. I felt edited because I thought it will be easier to do that job. I took the job in the North Point District. When i was finding jobs, it was frustrated, because the jobs didn't fit with my age. I felt so glad to have signed up. At first I had make a mistakes until my boss decided to fired me. But he gave me one more chance to prove that i'll be better than this. After two years worked, my contract had finished. I felt that time flew fast. It is good to worked here. I want my next job as a accountancy"