You could talk to your
- parent's friends
- your friends
Careers Box Recommended
Watch videos giving information about jobs on sites like Careers box (really good UK website with hundreds of videos about jobs)
It's quite hard to find relevant videos (and easy to get distracted!). Try searching for A day in the life of a.... You will probably find American jobs.
Think of a company and search for it. Most large companies have a Jobs or Vacancies page
Visit the ever helpful My Future Starts Here website.