Having a CV (Curriculum Vitae) is essential when applying for jobs. It tells an employer about you and why they should interview you.
At first you may not have much to put on your CV, but remember that this is a document that you add information to - you don't need to write a new CV every time you apply for a job.
Having the same qualifications as everyone else makes it hard for employers to choose between candidates. So what makes you different from everyone else?
It could be that you play sports - which shows that you know what teamwork and commitment are.
It could be that you have studied things outside the curriculum. For example, FutureLearn Schools has a range of courses for students aged 13+. They are free of charge, all online and are run by major universities. If you don't like the course, you simply stop and choose another one.
According to research, it can take as little as 7 seconds for someone to make a judgement about you!
Remember that employers have no obligation to give you the job - you are not doing them a favour and so it is essential that you make a good impression when attending an interview.