Junior,
The best ideas will probably come from your own thinking. Some advice:- understand the things that you are either good at already, or interested in and would be able to learn about quickly, or that you have friends or family who are good at. Then, from that stable of possible competencies under your influence or control, look at what might sell. Look at what product or service gaps there are - things that you think people want but which are not currently being offered, or offered at a good price. Then go about filling that gap with a product or service offering - start small, and build it up once you have some actual paying customers who you can get feedback from. My own children are currently selling eggs from our own back-yard chickens. They're about your age. It's modest, but it's a start.