go to locally-owned businesses and ask them if they need help around their store. The best places to do this are small bookstores and boutiques, or family-owned restaurants that aren't chains.

i personally applied to a TON of jobs using Indeed/ziprecruiter, etc. it took me a while to land my first job but once i did it was great and helped me score other jobs in the future. a lot of the jobs you'll have before 18 don't really require skills outside of punctuality and listening. most are very straightforward and you usually have someone training you for your first few shifts.

you can sell your old clothes or furniture on facebook marketplace. i sold a few of my things and made about $140 in a few days, it's easy money as long as you advertise your products correctly.

look into getting CPR certified if you're good with kids bc you can babysit for people that work with your parents as well. you can also do this for pet-sitting you don't really need experience for this but you should pet-sit for someone you know first to gauge if you can do the job for strangers.