No.681
Getting a job while still in high school was almost impossible for me. You basically had to know someone. I remember people wouldn't want to hire me for minimum wage jobs, even though it's like nearly free labour.
Some gas station called me in for an interview 6 months after I applied, what a joke.
Once you get a bit of experience somewhere it gets easier, but for now I would ask your friends, your friends parents, your parent's friends etc… See if they have any work for you or heard of places that are hiring. Follow up with them too, so they actually ask around.
It will probably be something local and physical rather than online.