Well in school you should try do a practical subject and get used to working with your hands. Physics is another subject that would be of benefit. It would help in the theory exams that you complete after each of the off the job training modules.
The Linguistic's interests are usually focused on ideas and information exchange. They tend to like reading a lot, and enjoy discussion about what has been said. Some will want to write about their own ideas and may follow a path towards journalism, or story writing or editing. Others will develop skills in other languages, perhaps finding work as a translator or interpreter. Most Linguistic types will enjoy the opportunity to teach or instruct people in a topic they are interested in.