While you're young, take the opportunity to try working in any kind of job that even remotely interests you. Change as often as you need to.
You need to find out what you love, or at least like, doing. I never did figure it out...and still don't know...and all that gets you is endless days of dissatisfaction.
Do NOT start working 7 days a week for $7/hour. That kind of work is worth it when you have a clear goal, and sufficient reward. If retail was your chosen direction, then you'd be doing the right thing.
Finally...the rest of the guys are right...you're going to work for mouth-breathing bottom-feeders as often as you work for experienced professionals, and it truly sucks. Look at it this way...imagine having to put up with a supervisor who is clearly dumber than a bag of hammers...and he's 10 years younger than you are. Not fun.
Hard work is really good, if you like what you do. Make certain, more than anything else, that you can stand to put your feet on the floor each morning and yuo'll be OK.
Luck!