God I feel your pain! I’m 17 and still haven’t got a job, and I reallllllllly need to save for uni next year :/ I’ve done the cv drop multiple times and everytime they say “Sorry we don’t need anyone at the moment, but we’ll keep your name on record.” GAH it gets so annoying! And all my mates have two jobs, talk about job hogging 
Even though it hasn’t worked for me yet, I still advise doing a cv drop around local shops. It takes a bit of confidence to begin with, but the people are always really nice. Make sure that you make your cv look professional, and if you don’t get anywhere the first time just keep trying!
I wish you more luck than I’ve had!!!