First. I want to say I love that you're willing to work to earn your own money.
There are many ways that you could earn money.
It's still mowing season right now, you could ask around to mow lawns if you have a lawn mower you can use.
Ask if anyone needs help cleaning up there yard, and hauling off trash.
When winter comes and if you get snow where you live, you could also shovel snow. I used to make money shoveling snow when I was a kid.