For advice, contact someone well-established in the field you wish to work in. Find out about provincial and federal programs and services available for students and youth, and register for any programs that interest you. In the job market, you have to make yourself stand out from the competition. You need to convince the employer that you are the best candidate for the job. Think about the things you do all the time - these are the basics of of great job skills.
Cooperation is very important.
You must also be able to write and speak effectively. It is an advertisement designed to sell your skills and abilities to an employer. Keep it short. Two pages is long enough. Organize information under headings.