High School Resume
In the event that you have just graduated from your high school and decided to apply for a job then no one will expect you to have a great history of work experience in your resume. The work experiences part or section in your resume will be missing when you are a newly graduated by this does not mean that you should not write down your trainings or internship you had on your resume.
In the event that you are going to write down your trainings regarding the job position you are applying, you can write down these information on the educational background section.
In the event that you had internship during your education you can create a work experience section and write down the details to here however try to locate your work experiences section right after your educational background section.
Your must highlight your educational background at first since you do not have any work experiences because usually internships are not cared that much and companies do not pay enough attention to them when there are other candidates who are literally worked in the business world and have real experience. Still this is not an obstacle for you since most of the companies love to educate their workers from the beginning.