Welcome to Fluther.
There are lots of jobs suitable for teenagers, starting with the classic “babysitting”. I did that as a teen, myself.
You can do a lot of other jobs directly for people. You can do light housekeeping, windows & floors, which I also did – and which led directly to my first salaried job, when the housewife I worked for strongly recommended me to her husband for work in his plant.
Lawn mowing and landscaping are jobs that are in demand in the Greater Los Angeles area, even cleaning garages and hauling away trash.
Really, if you stop thinking about “a job working for a paycheck” and think instead “what can I do for people?” you can make your own job, and even make your own business.
A friend of mine is a 15-year-old boy who started his own lawn mowing business and now employs three other teens himself.
If I were starting over, I’d avoid any kind of job such as the one I have now working for a salary determined and paid by others, and have my own business. I’m just too lazy to change and start that now, because it takes a lot of work, but will pay off well later on.