You really don't want to do it yourself, or you don't have the money. You can try to visit some restaurants. Other places are not suitable because they are young, and they are easy to be deceived!
If you go to KFC, people don't necessarily want you. You are too young. If you really want to try, you should generously find their manager and tell him that you want to find a job and see if he can provide you with this opportunity. Don't be afraid. I usually do cleaning and running errands, and I may arrange meals and vegetables later.