If you love movies, a great place to get a job as a 14-year-old is at your local theatre. It can be a small business movie theatre or a big chain like AMC. You can do jobs such as checking tickets, selling snacks, cleaning the rooms, etc.
Chains like Fareway and Publix offer jobs for 14-year-olds to make some extra money. Check with grocery stores close to your home to see if they have any job openings. You will most likely get a position stocking shelves or bagging groceries.