Well, you can do this by including two things that you have done in the past. Maybe it was babysitting, or maybe it was mowing the lawn for money, or maybe you had an actual job before hand. When you have collected enough data about yourself, you can create a resume. A resume is what you will include with your past experiences. Most people that hire (online anyways) will need to fill out a resume, because would you want to hire someone with experience over someone without any?
