Didn't you finish early after your exams?? Around Mayish... i did anyway last year. This is when i applied for a job when most were still at Uni/college.
It would probably be hard to get a job now, i'm waiting until September time when people go back to Uni = vacancies all round!
If your only 16, most will know you have not had experience anyway... however there is hope around this! You could say how your intrests e.g. Drama (example) have helped you gain confidence and communication skills with others etc.