Teenager,
To be perfectly honest, with the way the economy is now, I am thankful just to have a job. Think of it this way: do all your friends keep talking about how they want this and that? Well, the difference is, you'll actually be able to afford those things. I can probably attend FC and AC next year, soley because I am employed. If you budget right, and save a bit for later, you will notice the difference a job makes.
If you simply cannot stand your line of work, then prepare a resume (even if most of your experience is just volunteer work), get two letters of recommendation, and check on your application every day. I promise you - persistence pays off! Give them the notion that you are a hard worker and really want this job. Hopefully you'll get an interview. That is your chance to shine. I know this from experience. You have to distinguish yourself from every other faceless teenager that shows up on their doorstep. Persistence wins the fight here.
Don't worry too much about modesty on your resume. Stay honest, though.