Congratulations on being a young entrepreneur. First I would say to make sure you have a coach. A coach is vital to your success.
Then I would say make sure to identify your target market. Then market to them the idea of the product or service. I would not recommend creating a prototype without knowing if anyone will be interested. This will save you time, effort, and money. Also if the market doesn't receive your product, make some adjustments to find what works. Stay with it. Welcome to the entrepreneur journey. Best wishes!
Jennifer Cousette