American 18 year old college freshman here.
1)I've had "jobs" before but they were all under-the-table no taxes paid on the money. Usually direct jobs like mowing someone's lawn, working for a store related to a religious charity, or landscaping on rich people's yards.
2)Any jobs that required an application, either said "We'll call you back later" or "The manager will get to you". The only time I actually met with a manager, it was because a friend worked there and convinced the manager to see me. We talked and he said he'd hire me if a spot opened up in the future. I guess it never did. Anyways, I applied for jobs alot during late junior HS year, tried a little that summer, and applied for jobs alot early senior year. I was a grade A student with something like a 3.85 GPA, a minimal amount of extracurricular work, available time, and the ability to easily learn things.
Eventually, I was just like "fuck it" and haven't applied for a job since.
3)Now I'm in college. But I don't wanna take a job during freshman year, so I'll look for a job sometime later. I'm currently a CS major, so I hear of technical jobs and internships, but they almost always require more skills than I currently have. Hopefully I'll have those skills by the end of this year or sometime sophomore year.
I guess I'll find a job eventually, but right now I'm college-focused.
Oh and remember this, most of the time it's not what you know, it's who you know. If you just happen to fucking excel in some area it will get you places, but most people I know who get employed are employed because they know someone who works at the place of employment.