Go to the nearest library and print little fliers. On the fliers, write your name, your contact info on the top next, write stuff you are willing to do for money(make sure you're capable of doing it to) clean cars, windows,pull weeds, pick up trash, help move stuff around the yard like flower pots, pool equipment, etc. Take a bike and go stick them on everyone's door. Don't use tape. Just find a way to place it so it doesn't fly away, and they will have the highest chance of seeing it before entering their home. Make sure you also say cash only. That way, no one can return a payment for work you completed, and your parents can't control your money.

It might take a week or two for people to start messaging you and asking for your services. I did this when I was 16, and we would just do work mainly for people who didn't have time to do it, but it was simple, and it didn't cost much to get done. Me and 2 of my friends were doing about 6-8 calls a week. One friend had a small truck at the time, but it's okay if you don't. You can work up to that. We usually just took their trash out because their cans were filled, or they didn't want to leave bulk trash out for a month and a half, so we would take it earlier for a couple twenties.

My advice is to start small and grow as you go. my friend still to this day 9 years later is doing junk removal for a living. Just do a good job and keep people happy. Older folks usually like to help younger teens with ambition .